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Agilent Varian Thermal Switch for VHS-4, 6, 10, 250, & 400 Diffusion Pumps PN 642906025

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Agilent Varian Thermal Switch for VHS-4, 6, 10, 250, & 400 Diffusion Pumps PN 642906025

Condition:

New

Part Number:

P106938

Warranty:

Full Manufacturer's Warranty

Available Now 8

Sale: $236.09

Currency: US Dollar (USD)

Description

Agilent Varian Thermal Switch for VHS-4, 6,10, 250, & 400 Diffusion Pumps
PN 642906025

This is the Agilent Varian VHS-4, VHS-6, VHS-10, VHS-250, VHS-400 Diffusion Pump replacement Thermal Switch. (Set at 300º F, 148º C). See No. 15 below in illustration for thermal switch location on a VHS-4

Downloads

Agilent Varian VHS-10, VHS-400 High Vacuum Diffusion Pump Manual.pdf

PDF

Agilent Diffusion Pumps Catalog.pdf

PDF

Brochure

Specifications
Specification	Value
Pumping Speed, Operating Range	2,125 l/s air, 2,660 l/s He/H₂
Maximum Pumping Speed	3,700 l/s air w/standard cold cap; 4600 l/s Helium
Maximum Throughput	2.6 T-l/s (3.5 mbar-l/s) in operating range, 3.5 T-l/s (4.5 mbar-l/s) @ 0.01 Torr
Operating Range	1.2x10⁻³ to < 5x10⁻⁹ Torr (1.6 x 10⁻³ to < 6.5 x 10⁻⁹ mbar)
Maximum Forepressure	No Load: 0.65 Torr (0.85 mbar) Full Load: 0.55 Torr (0.72 mbar)
Recommended Backing Pump	≥ 17 cfm (29 m³/hr)
Backstreaming Rate	< 5.0 x 10⁻⁴ mg/cm²/min (with standard cold cap)
Warmup Time	10 minutes
Cooldown Time	10 minutes (with quick cool coil)
Fluid Charge	500 cc - Exact fluid charge available
Electrical Requirements	1 ph, 50/60 Hz, 120/208/240 VAC
Pump Power	2,200 Watts
Cooling Water Requirements	0.25 gpm (50 l/h)
Water Connections	⅛ in. FPT Tee

VHS-400 Diffusion Pump Replacement Parts List

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Description	Part No.	Item
Standard Cold Cap Assembly	F9584301	1
Sight Glass Repair Kit consisting of:	L8908301	2
Sight Glass	L8816001	5.1
Gasket, Teflon	L9694001	5.1
O-ring, Viton, Parker No. 2-113	CommI	5.1
O-ring, Viton, Parker No. 2-226	CommI	5.1
Jet Assembly w/Splash Baffle	F9548301	3
Splash Baffle (Included in the Jet Assembly Kit)		4
Foreline Baffle Assembly	L9172301	5
Baffle Retaining Ring	699992187	6
Thermal Switch Includes:	L8912301	7
Switch (set at 300 °F – 147 °C)	642906025	7a
Lug	648056680	7b
Wire	656179100
Box Insulator	89867001	7d
Heaters (one heater required per pump)		8
120V / 2200 watt Heater Element	647306125	5.1
208 V / 2220 watt Heater Element	647306175	5.1
240 V / 2200 watt Heater Element	647306225	5.1
Heater wire, 10 AWG, 36 inches (3 per pump required)	X3901-68002	9
Lug, Nickel	648056680	10
Heater Clamp Assembly, Includes:	86643301	11
Heater Cover Plate	86088301	11a
Heater Insulator	86087001	11b
Heater Clamp Plate	86086301	11c
Heater Insulation Blanket	L8998001	12
Heater Cover	L8997001	13
O-Ring Kit includes:	K0377178	14
3 inlet flange O-ring, Butyl No. 2-379
3 foreline flange O-ring, Butyl No. 2-332
10 Viton fill and drain O-rings (Old style), Viton No. 2-112		5.1
10 Viton fill and drain O-rings (new style, Parker No. 2-113		5.1
1 Sight glass O-ring, Parker No. 2-226		5.1
1 PTFE gasket		5.1
Screw, Socket hd cap, no. 8-32x1/4, stainless steel	Screw	15
Viton Centering ring for ISO inlet flange, 250K	IC250SV	16
Centering ring for foreline flange (ASA with 5 inches OD)		17
3/8 Hose 1/8 Pipe Barbed (included with the pump)		18
Ceramic Bushing (included with the pump)	699006025	19
Screw, Rd hd machine, no. 6-32x3/16, stainless steel	Screw	5.1
Stud, no. 8-32 x 1/2, stainless steel	Stud	5.1
NEOVAC SY diffusion pump fluid, 1000 cc	K6948301	5.1
DC-704 diffusion pump fluid, 500 cc (2 required)	695474005
DC-705 diffusion pump fluid, 500 cc (2 required)	695475005
Santovac 5 diffusion pump fluid, 500 cc	695405005
Installation and Operation Manual	699901021