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Varian VHS-4, VHS-6, VHS-250 Old-Style Diffusion Vacuum Pump Bottom Heater Cover - Ideal Vacuum Replacement

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Varian VHS-4, VHS-6, VHS-250 Old-Style Diffusion Vacuum Pump Bottom Heater Cover - Ideal Vacuum Replacement

Condition:

New

Part Number:

P103151

Warranty:

Against Product Defect

Available Now 1

Sale: $313.96

Currency: US Dollar (USD)

Description

Varian VHS-4, VHS-6 and VHS-250 Old-Style Diffusion Vacuum Pump Bottom Heater Cover

These Varian Varian VHS-4, VHS-6 and VHS-250 diffusion vacuum pump replacement bottom heater covers are made of Aluminum and are direct replacements. The heater cover protects the bottom of the diffusion pump and the heater assemble. Other diffusion pump accessories are available on this web site.

Downloads

Varian VHS-4 NRC Diffusion Pump and Components Brochure and Specifications.pdf

PDF

Agilent Varian VHS4 VHS6 & VHS250 Diffusion Vacuum Pumps.pdf

0.84 MB, PDF

Brochure

Specifications
Specification	Value
Pumping Speed, Operating Range	750 l/s air, 940l/s He/H₂
Maximum Pumping Speed	1,200 l/s air w/standard cold cap; 950 w/extended cold cap
Maximum Throughput	1.5 T-l/s (2.0 mbar-l/s) in operating range, 2.5 T-l/s (3.2 mbar-l/s) @ 0.01 Torr
Operating Range	2x10⁻³ to < 5x10⁻⁹ Torr (2.7 x 10⁻³ < 6.5 x 10⁻⁹ mbar)
Maximum Forepressure	No Load: 0.65 Torr (0.86 mbar) Full Load: 0.55 Torr (0.73 mbar)
Recommended Backing Pump	≥ 10 cfm (17 m³/hr)
Backstreaming Rate	< 5x10⁻⁴ mg/cm²/min (with standard cold cap)
Warmup Time	10 minutes
Cooldown Time	10 minutes (with quick cool coil)
Fluid Charge	300 cc
Electrical Requirements	1 ph, 50/60 Hz, 120/208/240 VAC
Pump Power	1,450 Watts
Cooling Water Requirements	0.5 gpm (30 l/h) at 60-80 °F (15-26 °C)
Water Connections	1/8 in. FPT Tee

VHS-4 Diffusion Pump Replacement Parts List

Description	Part No.	Item
Standard Cold Cap Assembly	86488301	1
Extended Cold Cap Assembly	F6898301	2
Sight Glass Repair Kit consisting of:	L8908301	3
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	F4785301	4
Splash Baffle	F4780301	5
Foreline Baffle Assembly	86754301	6
Thermal Switch Includes:	L8912301	7
Switch (set at 300 °F – 147 °C)	642906025	7a
Lug	648056680	7b
Wire	656179100	5.1
Box Insulator	89867001	7d
Heaters (one heater required per pump)		8
120 V / 1450 watt Heater Element	647304205	5.1
208 V / 1450 watt Heater Element	647304210	5.1
240 V / 450 watt Heater Assembly	647304250	5.1
VHS-4 heater wire, 10 AWG, 24 inches (3 per pump required)	X3901-68001	9
Lugs, Replacement, nickel	648056680	10
Heater Clamp	88164301	11
Heater Insulation	86087001	12
Baffle Retaining Ring	699992156	13
O-Ring Kit includes:	K0377183	14
3 Butyl inlet flange O-ring, Parker No. 2-258		5.1
10 Viton fill and drain O-rings (old style), Parker 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, Rd hd machine, no. 8-32x31/416, stainless steel	Screw	15
Stud, no. 8-32 x 1/2, stainless steel	Stud	16
Screw, Socket hd cap, no. 8-32x11/44, stainless steel	Screw	17
Centering ring for ISO inlet flange, 160K	IC160SV	18
Centering ring for ISO foreline flange, KF40	KC40SV	19
Santovac 5 diffusion pump fluid, 500 cc	695405005
Installation and Operation Manual	699901021