NEW Agilent Varian HS-20 High Vacuum Diffusion Pump with Standard Cold Cap, 17,500 L/S Pumping Speed20 Inch ASA Inlet, 27.5 in OD (20 Bolt) 4 Inch ASA Exhaust (8 bolt), 3-Phase 240 VAC These Agilent Varian High Throughput models include the series HS-16, HS-20, HS-32 and NHS-35. This is the HS-20 diffusion high throughput vacuum pump. They are the primary industrial standard for high vacuum pumping mechanisms. The Agilent Varian HS-20 diffusion pumps have a high pumping speed for all gases and low cost per unit pumping speed when compared with other types of pumps used in the same vacuum range. The full fractionating design allows vaporized fluid to be fractionated in the boiler and jet assembly. Contamination and decomposition products are pumped away and only the purest vapor reaches the top jet, assuring highest speed and lowest backstreaming. The vacuum fluid heater is mounted at the bottom of the pump body. The HS pumps have a fill and drain assembly for easy maintenance of pump fluid and continuous monitoring with thermal protection switches. Finned boilers increase the surface area which prolongs fluid life. The inlet is at the top, and the exhaust is through the foreline.Diffusion pumps use a high-speed jet of vapor to direct gas molecules in the pump throat down into the bottom of the pump and out the exhaust. The oil diffusion pump is operated with an oil that has low vapor pressure. Its purpose is to achieve higher vacuum (lower pressure) than possible by use of positive displacement pumps alone. Although its use has been mainly associated within the high vacuum range (down to 10-9 Torr), diffusion pumps today can produce pressures approaching 10-10 Torr when properly used with modern fluids and accessories. The features that make the diffusion pump attractive for high and ultra-high vacuum use are its high pumping speed for all gases and low cost per unit pumping speed when compared with other types of pump used in the same vacuum pressure range. Diffusion pumps have no motors and use only heaters to produce a vacuum. Diffusion pumps cannot discharge directly into the atmosphere, so a mechanical forepump is typically used to maintain an outlet pressure around 1 mTorr.These Agilent Varian model HS-20 high vacuum, high throughput diffusion pumps are new and can be ordered with either a 3-phase 240, 415 or 480 VAC heaters. With a standard cold cap or halo baffle. When ordering please specify which voltage or cap your application will require. We stock and sell diffusion pumps oils, e.g. IVP 704 diffusion pump fluids along with vacuum fittings, adapters, and replacement parts for your Agilent Varian HS-20 diffusion pumps. This pump uses IVP 704 diffusion pump fluid and is designed for high vacuum and fast pumping of large volumes of gas or vapor in production operations. For HS-20 Instruction Manual scroll down to manuals tab AVAILABLE DOWNLOADS: and download the PDF. Highlights For This Agilent Varian HS-20 Diffusion Pump 20 Inch ASA Inlet Flange (20 bolt holes) 27.5 in. OD, hole size 1.25 in. ASA 4 in Outlet Flange (8 bolt holes) 9" OD, hole size 13/16 in. Recommended Roughing Backing Pump: =100 CFM Standard Cold Cap Maximum Pumping Speed 17,500 l/s air, 22,000 l/s helium 240 VAC @ 2000 Watt Heater (6 required) Designed To Be Used With IVP 704 Diffusion Pump Oil (5 Quarts)

NEW Agilent Varian HS-20 High Vacuum Diffusion Pump with Halo Baffle, 17,500 L/S Pumping Speed20 Inch ASA Inlet, 27.5 in OD (20 Bolt) 4 Inch ASA Exhaust (8 bolt), 3-Phase 240 VAC These Agilent Varian High Throughput models include the series HS-16, HS-20, HS-32 and NHS-35. This is the HS-20 diffusion high throughput vacuum pump. They are the primary industrial standard for high vacuum pumping mechanisms. The Agilent Varian HS-20 diffusion pumps have a high pumping speed for all gases and low cost per unit pumping speed when compared with other types of pumps used in the same vacuum range. The full fractionating design allows vaporized fluid to be fractionated in the boiler and jet assembly. Contamination and decomposition products are pumped away and only the purest vapor reaches the top jet, assuring highest speed and lowest backstreaming. The vacuum fluid heater is mounted at the bottom of the pump body. The HS pumps have a fill and drain assembly for easy maintenance of pump fluid and continuous monitoring with thermal protection switches. Finned boilers increase the surface area which prolongs fluid life. The inlet is at the top, and the exhaust is through the foreline.Diffusion pumps use a high-speed jet of vapor to direct gas molecules in the pump throat down into the bottom of the pump and out the exhaust. The oil diffusion pump is operated with an oil that has low vapor pressure. Its purpose is to achieve higher vacuum (lower pressure) than possible by use of positive displacement pumps alone. Although its use has been mainly associated within the high vacuum range (down to 10-9 Torr), diffusion pumps today can produce pressures approaching 10-10 Torr when properly used with modern fluids and accessories. The features that make the diffusion pump attractive for high and ultra-high vacuum use are its high pumping speed for all gases and low cost per unit pumping speed when compared with other types of pump used in the same vacuum pressure range. Diffusion pumps have no motors and use only heaters to produce a vacuum. Diffusion pumps cannot discharge directly into the atmosphere, so a mechanical forepump is typically used to maintain an outlet pressure around 1 mTorr.These Agilent Varian model HS-20 high vacuum, high throughput diffusion pumps are new and can be ordered with either a 3-phase 240, 415 or 480 VAC heaters. With a standard cold cap or halo baffle. When ordering please specify which voltage or cap your application will require. We stock and sell diffusion pumps oils, e.g. IVP 704 diffusion pump fluids along with vacuum fittings, adapters, and replacement parts for your Agilent Varian HS-20 diffusion pumps. This pump uses IVP 704 diffusion pump fluid and is designed for high vacuum and fast pumping of large volumes of gas or vapor in production operations. For HS-20 Instruction Manual scroll down to manuals tab AVAILABLE DOWNLOADS: and download the PDF. Highlights For This Agilent Varian HS-20 Diffusion Pump 20 Inch ASA Inlet Flange (20 bolt holes) 27.5 in. OD, hole size 1.25 in. ASA 4 in Outlet Flange (8 bolt holes) 9" OD, hole size 13/16 in. Recommended Roughing Backing Pump: =100 CFM Halo Baffle Maximum Pumping Speed 17,500 l/s air, 22,000 l/s helium 240 VAC @ 2000 Watt Heater (6 required) Designed To Be Used With IVP 704 Diffusion Pump Oil (5 Quarts)

NEW Agilent Varian HS-20 High Vacuum Diffusion Pump with Standard Cold Cap, 17,500 L/S Pumping Speed20 Inch ASA Inlet, 27.5 in OD (20 Bolt) 4 Inch ASA Exhaust (8 bolt), 3-Phase 415 VAC These Agilent Varian High Throughput models include the series HS-16, HS-20, HS-32 and NHS-35. This is the HS-20 diffusion high throughput vacuum pump. They are the primary industrial standard for high vacuum pumping mechanisms. The Agilent Varian HS-20 diffusion pumps have a high pumping speed for all gases and low cost per unit pumping speed when compared with other types of pumps used in the same vacuum range. The full fractionating design allows vaporized fluid to be fractionated in the boiler and jet assembly. Contamination and decomposition products are pumped away and only the purest vapor reaches the top jet, assuring highest speed and lowest backstreaming. The vacuum fluid heater is mounted at the bottom of the pump body. The HS pumps have a fill and drain assembly for easy maintenance of pump fluid and continuous monitoring with thermal protection switches. Finned boilers increase the surface area which prolongs fluid life. The inlet is at the top, and the exhaust is through the foreline.Diffusion pumps use a high-speed jet of vapor to direct gas molecules in the pump throat down into the bottom of the pump and out the exhaust. The oil diffusion pump is operated with an oil that has low vapor pressure. Its purpose is to achieve higher vacuum (lower pressure) than possible by use of positive displacement pumps alone. Although its use has been mainly associated within the high vacuum range (down to 10-9 Torr), diffusion pumps today can produce pressures approaching 10-10 Torr when properly used with modern fluids and accessories. The features that make the diffusion pump attractive for high and ultra-high vacuum use are its high pumping speed for all gases and low cost per unit pumping speed when compared with other types of pump used in the same vacuum pressure range. Diffusion pumps have no motors and use only heaters to produce a vacuum. Diffusion pumps cannot discharge directly into the atmosphere, so a mechanical forepump is typically used to maintain an outlet pressure around 1 mTorr.These Agilent Varian model HS-20 high vacuum, high throughput diffusion pumps are new and can be ordered with either a 3-phase 240, 415 or 480 VAC heaters. With a standard cold cap or halo baffle. When ordering please specify which voltage or cap your application will require. We stock and sell diffusion pumps oils, e.g. IVP 704 diffusion pump fluids along with vacuum fittings, adapters, and replacement parts for your Agilent Varian HS-20 diffusion pumps. This pump uses IVP 704 diffusion pump fluid and is designed for high vacuum and fast pumping of large volumes of gas or vapor in production operations. For HS-20 Instruction Manual scroll down to manuals tab AVAILABLE DOWNLOADS: and download the PDF. Highlights For This Agilent Varian HS-20 Diffusion Pump 20 Inch ASA Inlet Flange (20 bolt holes) 27.5 in. OD, hole size 1.25 in. ASA 4 in Outlet Flange (8 bolt holes) 9" OD, hole size 13/16 in. Recommended Roughing Backing Pump: =100 CFM Standard Cold Cap Maximum Pumping Speed 17,500 l/s air, 22,000 l/s helium 415 VAC @ 2000 Watt Heater (6 required) Designed To Be Used With IVP 704 Diffusion Pump Oil (5 Quarts)

NEW Agilent Varian HS-20 High Vacuum Diffusion Pump with Halo Baffle, 17,500 L/S Pumping Speed20 Inch ASA Inlet, 27.5 in OD (20 Bolt) 4 Inch ASA Exhaust (8 bolt), 3-Phase 415 VAC. These Agilent Varian High Throughput models include the series HS-16, HS-20, HS-32 and NHS-35. This is the HS-20 diffusion high throughput vacuum pump. They are the primary industrial standard for high vacuum pumping mechanisms. The Agilent Varian HS-20 diffusion pumps have a high pumping speed for all gases and low cost per unit pumping speed when compared with other types of pumps used in the same vacuum range. The full fractionating design allows vaporized fluid to be fractionated in the boiler and jet assembly. Contamination and decomposition products are pumped away and only the purest vapor reaches the top jet, assuring highest speed and lowest backstreaming. The vacuum fluid heater is mounted at the bottom of the pump body. The HS pumps have a fill and drain assembly for easy maintenance of pump fluid and continuous monitoring with thermal protection switches. Finned boilers increase the surface area which prolongs fluid life. The inlet is at the top, and the exhaust is through the foreline.Diffusion pumps use a high-speed jet of vapor to direct gas molecules in the pump throat down into the bottom of the pump and out the exhaust. The oil diffusion pump is operated with an oil that has low vapor pressure. Its purpose is to achieve higher vacuum (lower pressure) than possible by use of positive displacement pumps alone. Although its use has been mainly associated within the high vacuum range (down to 10-9 Torr), diffusion pumps today can produce pressures approaching 10-10 Torr when properly used with modern fluids and accessories. The features that make the diffusion pump attractive for high and ultra-high vacuum use are its high pumping speed for all gases and low cost per unit pumping speed when compared with other types of pump used in the same vacuum pressure range. Diffusion pumps have no motors and use only heaters to produce a vacuum. Diffusion pumps cannot discharge directly into the atmosphere, so a mechanical forepump is typically used to maintain an outlet pressure around 1 mTorr.These Agilent Varian model HS-20 high vacuum, high throughput diffusion pumps are new and can be ordered with either a 3-phase 240, 415 or 480 VAC heaters. With a standard cold cap or halo baffle. When ordering please specify which voltage or cap your application will require. We stock and sell diffusion pumps oils, e.g. IVP 704 diffusion pump fluids along with vacuum fittings, adapters, and replacement parts for your Agilent Varian HS-20 diffusion pumps. This pump uses IVP 704 diffusion pump fluid and is designed for high vacuum and fast pumping of large volumes of gas or vapor in production operations. For HS-20 Instruction Manual scroll down to manuals tab AVAILABLE DOWNLOADS: and download the PDF. Highlights For This Agilent Varian HS-20 Diffusion Pump 20 Inch ASA Inlet Flange (20 bolt holes) 27.5 in. OD, hole size 1.25 in. ASA 4 in Outlet Flange (8 bolt holes) 9" OD, hole size 13/16 in. Recommended Roughing Backing Pump: =100 CFM Halo Baffle Maximum Pumping Speed 17,500 l/s air, 22,000 l/s helium 415 VAC @ 2000 Watt Heater (6 required) Designed To Be Used With IVP 704 Diffusion Pump Oil (5 Quarts)

NEW Agilent Varian HS-20 High Vacuum Diffusion Pump with Standard Cold Cap, 17,500 L/S Pumping Speed20 Inch ASA Inlet, 27.5 in OD (20 Bolt) 4 Inch ASA Exhaust (8 bolt), 3-Phase 480 VAC These Agilent Varian High Throughput models include the series HS-16, HS-20, HS-32 and NHS-35. This is the HS-20 diffusion high throughput vacuum pump. They are the primary industrial standard for high vacuum pumping mechanisms. The Agilent Varian HS-20 diffusion pumps have a high pumping speed for all gases and low cost per unit pumping speed when compared with other types of pumps used in the same vacuum range. The full fractionating design allows vaporized fluid to be fractionated in the boiler and jet assembly. Contamination and decomposition products are pumped away and only the purest vapor reaches the top jet, assuring highest speed and lowest backstreaming. The vacuum fluid heater is mounted at the bottom of the pump body. The HS pumps have a fill and drain assembly for easy maintenance of pump fluid and continuous monitoring with thermal protection switches. Finned boilers increase the surface area which prolongs fluid life. The inlet is at the top, and the exhaust is through the foreline.Diffusion pumps use a high-speed jet of vapor to direct gas molecules in the pump throat down into the bottom of the pump and out the exhaust. The oil diffusion pump is operated with an oil that has low vapor pressure. Its purpose is to achieve higher vacuum (lower pressure) than possible by use of positive displacement pumps alone. Although its use has been mainly associated within the high vacuum range (down to 10-9 Torr), diffusion pumps today can produce pressures approaching 10-10 Torr when properly used with modern fluids and accessories. The features that make the diffusion pump attractive for high and ultra-high vacuum use are its high pumping speed for all gases and low cost per unit pumping speed when compared with other types of pump used in the same vacuum pressure range. Diffusion pumps have no motors and use only heaters to produce a vacuum. Diffusion pumps cannot discharge directly into the atmosphere, so a mechanical forepump is typically used to maintain an outlet pressure around 1 mTorr.These Agilent Varian model HS-20 high vacuum, high throughput diffusion pumps are new and can be ordered with either a 3-phase 240, 415 or 480 VAC heaters. With a standard cold cap or halo baffle. When ordering please specify which voltage or cap your application will require. We stock and sell diffusion pumps oils, e.g. IVP 704 diffusion pump fluids along with vacuum fittings, adapters, and replacement parts for your Agilent Varian HS-20 diffusion pumps. This pump uses IVP 704 diffusion pump fluid and is designed for high vacuum and fast pumping of large volumes of gas or vapor in production operations. For HS-20 Instruction Manual scroll down to manuals tab AVAILABLE DOWNLOADS: and download the PDF. Highlights For This Agilent Varian HS-20 Diffusion Pump 20 Inch ASA Inlet Flange (20 bolt holes) 27.5 in. OD, hole size 1.25 in. ASA 4 in Outlet Flange (8 bolt holes) 9" OD, hole size 13/16 in. Recommended Roughing Backing Pump: =100 CFM Standard Cold Cap Maximum Pumping Speed 17,500 l/s air, 22,000 l/s helium 480 VAC @ 2000 Watt Heater (6 required) Designed To Be Used With IVP 704 Diffusion Pump Oil (5 Quarts)

NEW Agilent Varian HS-20 High Vacuum Diffusion Pump with Halo Baffle, 17,500 L/S Pumping Speed20 Inch ASA Inlet, 27.5 in OD (20 Bolt) 4 Inch ASA Exhaust (8 bolt), 3-Phase 480 VAC. These Agilent Varian High Throughput models include the series HS-16, HS-20, HS-32 and NHS-35. This is the HS-20 diffusion high throughput vacuum pump. They are the primary industrial standard for high vacuum pumping mechanisms. The Agilent Varian HS-20 diffusion pumps have a high pumping speed for all gases and low cost per unit pumping speed when compared with other types of pumps used in the same vacuum range. The full fractionating design allows vaporized fluid to be fractionated in the boiler and jet assembly. Contamination and decomposition products are pumped away and only the purest vapor reaches the top jet, assuring highest speed and lowest backstreaming. The vacuum fluid heater is mounted at the bottom of the pump body. The HS pumps have a fill and drain assembly for easy maintenance of pump fluid and continuous monitoring with thermal protection switches. Finned boilers increase the surface area which prolongs fluid life. The inlet is at the top, and the exhaust is through the foreline.Diffusion pumps use a high-speed jet of vapor to direct gas molecules in the pump throat down into the bottom of the pump and out the exhaust. The oil diffusion pump is operated with an oil that has low vapor pressure. Its purpose is to achieve higher vacuum (lower pressure) than possible by use of positive displacement pumps alone. Although its use has been mainly associated within the high vacuum range (down to 10-9 Torr), diffusion pumps today can produce pressures approaching 10-10 Torr when properly used with modern fluids and accessories. The features that make the diffusion pump attractive for high and ultra-high vacuum use are its high pumping speed for all gases and low cost per unit pumping speed when compared with other types of pump used in the same vacuum pressure range. Diffusion pumps have no motors and use only heaters to produce a vacuum. Diffusion pumps cannot discharge directly into the atmosphere, so a mechanical forepump is typically used to maintain an outlet pressure around 1 mTorr.These Agilent Varian model HS-20 high vacuum, high throughput diffusion pumps are new and can be ordered with either a 3-phase 240, 415 or 480 VAC heaters. With a standard cold cap or halo baffle. When ordering please specify which voltage or cap your application will require. We stock and sell diffusion pumps oils, e.g. IVP 704 diffusion pump fluids along with vacuum fittings, adapters, and replacement parts for your Agilent Varian HS-20 diffusion pumps. This pump uses IVP 704 diffusion pump fluid and is designed for high vacuum and fast pumping of large volumes of gas or vapor in production operations. For HS-20 Instruction Manual scroll down to manuals tab AVAILABLE DOWNLOADS: and download the PDF. Highlights For This Agilent Varian HS-20 Diffusion Pump 20 Inch ASA Inlet Flange (20 bolt holes) 27.5 in. OD, hole size 1.25 in. ASA 4 in Outlet Flange (8 bolt holes) 9" OD, hole size 13/16 in. Recommended Roughing Backing Pump: =100 CFM Halo Baffle Maximum Pumping Speed 17,500 l/s air, 22,000 l/s helium 480 VAC @ 2000 Watt Heater (6 required) Designed To Be Used With IVP 704 Diffusion Pump Oil (5 Quarts)

Agilent Varian HS-20 Diffusion Pump Replacement Standard Cold Cap. Agilent Varian PN 84358301. These Agilent Varian HS-20 diffusion pump standard cold cap are a replacement part that can be installed at the customer's location. There are two types of cold caps, standard and Halo Baffle. The type of cold cap used will influence factors, such as, oil backstreaming and final pumping speed of the diffusion pump. For example, the standard cold cap is an option that fits inside the HS-20 pumps in place of the standard cold cap. The cold cap stops backstreaming as effectively as an optically dense baffle, yet it retains 60% of the pump’s speed. Residual backstreaming is so low that it cannot be measured by the American Vacuum Society’s standard collection method. For location of the cold cap please see item #1 on diagram exploded view & parts illustration shown below. For removal installation procedures of cold cap see page 38 of instruction manual PDF below. These cold caps are OEM original Agilent Varian replacement parts with part number K1855320.

Agilent Varian HS-20 Diffusion Pump Replacement Water Cooled Halo Baffle. Agilent Varian PN K1855320. These Agilent Varian HS-20 diffusion pump water cooled halo baffle are a replacement part that can be installed at the customer's location. There are two types of cold caps, standard and Halo Baffle. The type of cold cap used will influence factors, such as, oil backstreaming and final pumping speed of the diffusion pump. For example, the Halo Baffle Cold Cap is an option that fits inside the HS-20 pumps in place of the standard cold cap. The Halo Baffle stops backstreaming as effectively as an optically dense baffle, yet it retains 60% of the pump’s speed. Residual backstreaming is so low that it cannot be measured by the American Vacuum Society’s standard collection method. For location of the cold cap please see item #1 on diagram exploded view & parts illustration shown below. For removal installation procedures of cold cap see page 38 of instruction manual PDF below. These halo baffles are OEM original Agilent Varian replacement parts with part number K1855320.

Agilent Varian HS-20 Foreline Baffle Assembly, Diffusion Pump Replacement Parts Agilent Varian Part Number 84889301 These Agilent Varian HS-20 diffusion pump replacement foreline baffle assemblies are OEM Agilent Varian replacement parts with part number 84889301. The foreline baffle is located in the roughing line exhaust arm of the diffusion pump. They are designed to help prevent diffusion pump oil from being transported to the roughing pump under high throughput conditions. See the HS-20 diffusion pump roughing line arm noted by balloon #5 in the illustration below.

Agilent Varian HS-20 Jet Assembly, Diffusion Pump Replacement Parts Agilent Varian Part Number 84350301 These Agilent Varian HS-20 diffusion pump jet assembly are OEM Agilent Varian replacement parts for the HS-20 diffusion vacuum pumps. This kit includes the complete jet assembly components, see the jet assembly referenced on page 40 in instruction manual PDF below. These are original OEM Agilent Varian replacement parts for the HS-20 diffusion pump having part number PN 84350301, see item #3 in the diagram exploded view & parts illustration below.

Agilent Varian HS-20 Jet Sprint Coupling Diffusion Pump Replacement Part Agilent Varian Part Number L6367301 These Agilent Varian HS-20 diffusion pump Jet Sprint Coupling part, is part of the jet assembly and is a OEM Agilent Varian replacement part for the HS-20 diffusion vacuum pump. See referenced on Page 40 in instruction manual PDF below. These are original OEM Agilent Varian replacement parts for the HS-20 diffusion pump having part number L6367301, see item #4 in the diagram exploded view & parts illustration below.

Agilent Varian HS-20, ASA 20 in. Inlet Diffusion Pump O-Ring Kit.Agient Varian Part Number: K0377165. This is the Agilent Varian HS-20, ASA 20 in. (ASA 20 in.) Diffusion Pump O-Ring Kit. O-Ring Kit Contains: 1 Butyl inlet flange O-ring, ASA 20 inch 1 Foreline flange O-ring, ASA 4 inch 8 Viton fill and drain O-rings 4 Viton O-rings 1 Sight glass O-ring 1 Graphite sight glass gasket

Agilent Varian HS-20 Oil Drain Plug, Diffusion Vacuum Pump Replacement Parts Agilent Varian Part Number PN 77261001 This is a replacement Oil Drain Plug. Fits the Agilent Varian HS-20 Diffusion Pump. For location of the oil drain plug see figure #7 (diagram exploded view & parts illustration) below.

Agilent Varian HS-20 Oil Sight Glass, Diffusion Vacuum Pump Replacement Parts Agilent Varian Part Number PN L9223001 This is a replacement Oil Sight Glass. Fits the Agilent Varian HS-20 Diffusion Pump. For location of the sight glass kit see item #6 on (diagram exploded view & parts illustration) below. For pumps built AFTER OCT. 1995.

Agilent Varian HS-20, HS-32, HS-35 Oil Sight Graphite Gasket Diffusion Vacuum Pump Replacement Parts PN: L9228001 This is an Agilent Varian replacement graphite gasket for the oil sight glass on HS-20, HS-32, and HS35 diffusion pumps. For location of the sight glass on the pump see item #7 on (diagram exploded view & parts illustration) below. For pumps built after OCT. 1995.

Agilent Varian HS-20 Oil Sight Glass Service Kit, Diffusion Vacuum Pump Replacement Parts Agilent Varian Part Number PN F6097301 This is a replacement Oil Sight Glass Service Kit. Fits the Agilent Varian HS-20 Diffusion Pump. For location of the sight glass kit see item #6 on (diagram exploded view & parts illustration) below. For pumps built before OCT. 1995.

Agilent Varian HS-20 Diffusion Pump Cold cap and nut follower (2 each) Agilent Varian Part Number L8840301 These Agilent Varian HS-20 diffusion pump cold cap and nut follower (2 each), is part of the jet assembly and is a OEM Agilent Varian replacement part for the HS-20 diffusion vacuum pump. These are original OEM Agilent Varian replacement parts for the HS-20 diffusion pump having part number L8839301, see item #2 in the diagram exploded view & parts illustration below.

Agilent Varian HS-20 Diffusion Pump Cold cap gasket/grommet (kit of 4) Agilent Varian Part Number L8839301 These Agilent Varian HS-20 diffusion pump cold cap gasket grommet (kit of 4), is part of the jet assembly and is a OEM Agilent Varian replacement part for the HS-20 diffusion vacuum pump. These are original OEM Agilent Varian replacement parts for the HS-20 diffusion pump having part number L8839301, see item #2 in the diagram exploded view & parts illustration below.

Agilent Varian HS-20/32, NHS-35 Diffusion Pump Cold cap female coupling Agilent Varian Part Number 622445026 This Agilent Varian HS-20/32, NHS-35 diffusion pump cold cap female coupling, is part of the cold cap assembly and is an OEM Agilent Varian replacement part for the HS-20/32 and NHS-35 diffusion vacuum pump. This is an original OEM Agilent Varian replacement part for the HS-20/32 and NHS-35 diffusion pump having part number 622445026, see item #18 in the diagram exploded view & parts illustration below.

Agilent Varian HS-20 Heater Nickle Wire 10 AWG, 120 inches long, Diffusion Vacuum Pump Replacement Parts Agilent Varian Part Number PN X3900-68006 This is a replacement heater nickle wire, 10 AWG, 120 inches long. Fits the Agilent Varian HS-20 Diffusion Pump. For location of the heater wire see figure #10 (diagram exploded view & parts illustration) below. (2 per heater required)

Agilent Varian HS-20 Heater Nickle Wire 14 AWG, 80 inches long, Diffusion Vacuum Pump Replacement Parts Agilent Varian Part Number PN X3900-68006 This is a replacement heater nickle wire, 14 AWG, 80 inches long. Fits the Agilent Varian HS-20 Diffusion Pump. For location of the heater wire see figure #10 (diagram exploded view & parts illustration) below. (2 per heater required)

Agilent Varian HS-20 and HS16 Upper Thermal Switch, Diffusion Vacuum Pump Replacement Parts Agilent Varian Part Number PN K9050001 This is a replacement upper thermal (water) switch. Fits the Agilent Varian HS-20/16 Diffusion Pump. Set at 185º F, 85º C. For location of the upper thermal switch see figure #8 (diagram exploded view & parts illustration) below.

Agilent Varian HS-20 Diffusion Pump, Heater Insulation Blanket, 3 Pieces Agilent Varian Part Number PN L6514001 This is a replacement heater insulation blanket. Fits the Agilent Varian HS-20 Diffusion Pump. 3 pieces Cerablanket, 0.50 inch thick. For location of the insulation blanket see item #14 (diagram exploded view & parts illustration) below.

Agilent Varian HS-20 HS16 Lower Thermal Switch, Diffusion Vacuum Pump Replacement Parts Agilent Varian Part Number PN K9050002 This is a replacement lower thermal (boiler) switch. Fits the Agilent Varian HS-20 HS-16 Diffusion Pump. Set at 390º F, 199º C. For location of the upper thermal switch see figure #9 (diagram exploded view & parts illustration) below.

Agilent Varian HS-20 HS-16 Lower and Upper Thermal Switch KIT, Diffusion Vacuum Pump Replacement Parts Agilent Varian Part Number PN L8841301 This is replacement thermal switches for the Lower (boiler) and Upper (water) switches. Fits the Agilent Varian HS-20 HS-16 Diffusion Pump. Lower Switch Set at 390º F, 199º C. Upper Switch Set at 185º F, 85º C. For location of the upper and lower thermal switches see figure #9 (diagram exploded view & parts illustration) below.

Agilent Varian HS-20 Diffusion Pump, Heater Element no leads, 200 or 415 Vac, 2000 WattsAgilent Varian Part Number PN 647320060 (For pumps built before May 1990) This is a replacement heater element no leads, 200 or 415 V, 2000 W. (1 each) Fits the Agilent Varian HS-20 Diffusion Pump. For Pumps built before May 1990. For location of the heater element see item #11 (diagram exploded view & parts illustration) below. (6 required per pump)

Agilent Varian HS-20 Diffusion Pump, Heater Element no leads, 480 Vac, 2000 Watts Agilent Varian Part Number PN 647320070 (For pumps built before May 1990) This is a replacement heater element no leads, 480 V, 2000 W. (1 each) Fits the Agilent Varian HS-20 Diffusion Pump. For Pumps built before May 1990. For location of the heater element see item #11 (diagram exploded view & parts illustration) below. (6 required per pump)

Agilent Varian HS-20 Diffusion Pump, Replacement Crush Plate Agilent Varian Part Number PN K7108001 (Should be replaced when heater is replaced) This is a replacement crush plate.(1 each) Fits the Agilent Varian HS-20 Diffusion Pump. Should be replaced when heater is replaced. For location of the crush plate see item #12 (diagram exploded view & parts illustration) below.

Agilent Varian HS-20 Diffusion Pump, Replacement Clamping Plate Agilent Varian Part Number PN K7107001 (6 required per pump) This is a replacement clamping plate.(1 each) Fits the Agilent Varian HS-20 Diffusion Pump. 6 required per pump. For location of the clamping plate see item #13 (diagram exploded view & parts illustration) below.

Agilent Varian HS-20 Diffusion Pump, Heater Cover Plate. Agilent Varian Part Number PN 84497001 This is a replacement heater cover plate. Fits the Agilent Varian HS-20 diffusion vacuum pump. For location of the heater cover plate see item #15 (diagram exploded view & parts illustration) below.

Agilent Varian HS-20 Diffusion Pump, Heater Element with leads, 200 Vac, 2000 Watts Agilent Varian Part Number PN 647320025 This is a replacement heater element with leads, 200 V, 2000 W. (1 each) Fits the Agilent Varian HS-20 Diffusion Pump. For location of the heater element see item #11 (diagram exploded view & parts illustration) below. (6 required per pump)

Agilent Varian HS-20 Diffusion Pump, Heater Element with leads, 200 or 415 Vac, 2000 Watts Agilent Varian Part Number PN 647320020 This is a replacement heater element with leads, 200 or 415 V, 2000 W. (1 each) Fits the Agilent Varian HS-20 Diffusion Pump. For location of the heater element see item #11 (diagram exploded view & parts illustration) below. (6 required per pump)

Agilent Varian HS-20 Diffusion Pump, Heater Element with leads, 400 Vac, 2000 Watts Agilent Varian Part Number PN 647320035 This is a replacement heater element with leads, 400 V, 2000 W. (1 each) Fits the Agilent Varian HS-20 Diffusion Pump. For location of the heater element see item #11 (diagram exploded view & parts illustration) below. (6 required per pump)

Agilent Varian HS-20 Diffusion Pump, Heater Element with leads, 430 Vac, 2000 Watts Agilent Varian Part Number PN 647320040 This is a replacement heater element with leads, 430 V, 2000 W. (1 each) Fits the Agilent Varian HS-20 Diffusion Pump. For location of the heater element see item #11 (diagram exploded view & parts illustration) below. (6 required per pump)

Agilent Varian HS-20 Diffusion Pump, Heater Element with leads, 440 Vac, 2000 Watts Agilent Varian Part Number PN 647320045 This is a replacement heater element with leads, 440 V, 2000 W. (1 each) Fits the Agilent Varian HS-20 Diffusion Pump. For location of the heater element see item #11 (diagram exploded view & parts illustration) below. (6 required per pump)

Agilent Varian HS-20 Diffusion Pump, Heater Element with leads, 480 Vac, 2000 Watts Agilent Varian Part Number PN 647320030 This is a replacement heater element with leads, 480 V, 2000 W. (1 each) Fits the Agilent Varian HS-20 Diffusion Pump. For location of the heater element see item #11 (diagram exploded view & parts illustration) below. (6 required per pump)

Agilent Varian Bolts to Attach ASA Gate Valves to ASA Diffusion Pumps 3/4-10 1-1/4" Length Hex Bolt - Course Thread, 1 each. These are bolts to attach ASA Gate Valves to ASA Diffusion pumps, ASA sizes 6, 8 and 10 inch. One each, size 3/4-10 1-1/4" Length Hex Bolt - Course Thread.