The Agilent Varian VHS-400 has been designed to fill a special need in applications where high pumping speeds are required and space limitations demand a compact pump. The VHS-400 pump is a rugged, general-purpose unit with an operating range of 1.4 x 10-3 to / min, without the use of any cooled cold cap. This Agilent Varian VHS-400 Diffusion Pump Includes:

The Agilent Varian VHS-400 has been designed to fill a special need in applications where high pumping speeds are required and space limitations demand a compact pump. The VHS-400 pump is a rugged, general-purpose unit with an operating range of 1.4 x 10-3 to / min, without the use of any cooled cold cap. This Agilent Varian VHS-400 Diffusion Pump Includes:

The Agilent Varian VHS-400 has been designed to fill a special need in applications where high pumping speeds are required and space limitations demand a compact pump. The VHS-400 pump is a rugged, general-purpose unit with an operating range of 1.4 x 10-3 to / min, without the use of any cooled cold cap. This Agilent Varian VHS-400 Diffusion Pump Includes:

The Agilent Varian VHS-400 has been designed to fill a special need in applications where high pumping speeds are required and space limitations demand a compact pump. The VHS-400 pump is a rugged, general-purpose unit with an operating range of 1.4 x 10-3 to / min, without the use of any cooled cold cap. This Agilent Varian VHS-400 Diffusion Pump Includes:

These Agilent Varian VHS-400 diffusion pump standard cold caps are a replacement part that can be installed at the customer's location. There are two types of cold caps, standard and extended. The type of cold cap used will influence factors, such as, oil backstreaming and final pumping speed of the diffusion pump. For example, the Extended Cold Cap is an option that fits inside the VHS-400 pumps in place of the standard cold cap. It stops backstreaming as effectively as an optically dense baffle, yet it retains 80% 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 41 of instruction manual PDF below. These standard cold caps are OEM original Agilent Varian replacement parts with part number K4823301.

These Agilent Varian VHS-400 diffusion pump jet assemblies are OEM Agilent Varian replacement parts for the VHS-400 diffusion vacuum pumps. This kit includes the complete jet assembly components, see the jet assembly referenced in Page 42 in instruction manual PDF below. These are original OEM Agilent Varian replacement parts for the VHS-400 diffusion pump having part number F0428401, see item #2 in the diagram exploded view & parts illustration below.

These Agilent Varian VHS-400 diffusion pump splash baffle part, it is part of the jet assembly and is a OEM Agilent Varian replacement part for the VHS-400 diffusion vacuum pump. See referenced on Page 42 in instruction manual PDF below. These are original OEM Agilent Varian replacement parts for the VHS-400 diffusion pump having part number F0431301, see item #4 in the diagram exploded view & parts illustration below.

These Agilent Varian VHS-400 diffusion pump jet coupling part, it is part of the jet assembly and is a OEM Agilent Varian replacement part for the VHS-400 diffusion vacuum pump. See referenced on Page 42 in instruction manual PDF below. These are original OEM Agilent Varian replacement parts for the VHS-400 diffusion pump having part number L6367301, see item #5 in the diagram exploded view & parts illustration below.

These Agilent Varian VHS-400 diffusion pump replacement foreline baffle assemblies are OEM Agilent Varian replacement parts with part number F0435301. 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 VHS-400 diffusion pump roughing line arm noted by balloon #5 in the illustration below.

This is a replacement Sight Glass Kit. Fits the Agilent Varian VHS-400 Diffusion Pump. For location of the sight glass kit see item #3 on (diagram exploded view & parts illustration) below.

These O-Ring kits fit the Agilent Varian VHS-400, ASA 18 inch OD Non Standard, Diffusion Pump. Other diffusion pump accessories are available on this web site. O-Ring Kit Contains: 1 Inlet Flange O-Ring ASA Non Standard Butyl No. 2-385 1 Foreline Outlet Flange O-Ring ASA 2 in. Butyl No. 2-338 10 Viton fill and drain O-rings (old style), Parker No. 2-112 10 Viton fill and drain O-rings (new style, Parker No. 2-113 1 PTFE gasket 1 Sight glass O-ring, Parker No. 2-226

This is the Agilent Varian VHS-400 Diffusion Pump stranded nickel heater wire, 10 AWG, Sold by the foot. (3 - 42 inch lengths required for total replacement per pump). See No. 8 below in illustration for heater wire location.

These Agilent Varian VHS-400 diffusion pump heater insulator covers are used to insulate the heater from pumps bottom cover. These heater insulators are used in the new-style diffusion pumps. These are OEM Agilent Varian replacement parts with part number L8903301, see item #13 below in illustration for heater insulator location.

This is the Agilent Varian VHS-400 Diffusion Pump stranded nickel heater wire kit, 10 AWG wire (15ft.) Terminal Strip Molex, and 10 lugs. See No. 8 below in illustration for heater wire location.

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

This is a Thermal Switch Kit. Fits the Agilent Varian VHS-400 Diffusion Pump. For location of the baffle retaining ring see item #7 on (diagram exploded view & parts illustration) below. This Thermal Switch Kit includes: Thermal Switch Box Insulator

Varian Agilent Part Number K7667001 These Agilent Varian VHS-400 diffusion pump crush plates are for Agilent Varian diffusion vacuum pumps. The crush plate is required during heater replacement. Other diffusion pump accessories are available on this web site.

These Agilent Varian VHS-400 Heater Cover Plate. The Agilent Varian part number for this is L8903301 and its location is item #13 in graphic diagram and description below. Other diffusion pump accessories are available on this web site.

These Agilent Varian VHS-10 are SLOTTED retrofit clamping plates. The Agilent Varian part number for this is R2667301 and its location is item #12 in graphic diagram and description below. Other diffusion pump accessories are available on this web site.

These Agilent Varian VHS-400 are A36 steel heater clamping plates. The Agilent Varian part number for this is K4928001 and its location is item #11 in graphic diagram and description below. Other diffusion pump accessories are available on this web site.

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.

These Agilent Varian VHS-400 diffusion vacuum pump Tubular-Style replacement heaters are for use with 480 VAC input power. These heaters pull 2200 Watts, 4.6 Amps and have a room temperature resistance of 104 Ohms. These heaters are designed to be operated by 480 VAC, two heaters are required for (4400 Watts of heating power). For heater assembly replacement instructions see page 43 in the instruction manual .pdf below. The Agilent Varian part number for this heater is 647310170. Other diffusion pump accessories are available on this web site.

These Agilent Varian VHS-400 diffusion vacuum pump Tubular-Style replacement heaters are for use with 208 VAC input power. These heaters pull 2200 Watts, 10.6 Amps and have a room temperature resistance of 19.6 Ohms. These heaters are designed to be operated by 208 VAC, two heaters are required for (4400 Watts of heating power). For heater assembly replacement instructions see page 43 in the instruction manual .pdf below. The Agilent Varian part number for this heater is 647310140. Other diffusion pump accessories are available on this web site.

These Agilent Varian VHS-400 diffusion vacuum pump Tubular-Style replacement heaters are for use with 208 VAC input power. These heaters pull 2550 Watts, 12.2 Amps and have a room temperature resistance of 17 Ohms. These heaters are designed to be operated by 208 VAC, two heaters are required for (5100 Watts of heating power). For heater assembly replacement instructions see page 43 in the instruction manual .pdf below. The Agilent Varian part number for this heater is 647310145 and its location is item #10 in graphic diagram and description below. Other diffusion pump accessories are available on this web site.

These Agilent Varian VHS-400 diffusion vacuum pump Tubular-Style replacement heaters are for use with 240 VAC input power. These heaters pull 2200 Watts, 9.2 Amps and have a room temperature resistance of 26 Ohms. These heaters are designed to be operated by 240 VAC, two heaters are required for (4400 Watts of heating power). For heater assembly replacement instructions see page 43 in the instruction manual .pdf below. The Agilent Varian part number for this heater is 647310150. Other diffusion pump accessories are available on this web site.

These Agilent Varian VHS-400 diffusion vacuum pump Tubular-Style replacement heaters are for use with 240 VAC input power. These heaters pull 2550 Watts, 10.6 Amps and have a room temperature resistance of 22.6 Ohms. These heaters are designed to be operated by 240 VAC, two heaters are required for (5100 Watts of heating power). For heater assembly replacement instructions see page 43 in the instruction manual .pdf below. The Agilent Varian part number for this heater is 647310155 and its location is item #10 in graphic diagram and description below. Other diffusion pump accessories are available on this web site.

These Agilent Varian VHS-400 diffusion vacuum pump Tubular-Style replacement heaters are for use with 380 VAC input power. These heaters pull 2200 Watts, 5.8 Amps and have a room temperature resistance of 66 Ohms. These heaters are designed to be operated by 380 VAC, two heaters are required for (4400 Watts of heating power). For heater assembly replacement instructions see page 43 in the instruction manual .pdf below. The Agilent Varian part number for this heater is 647310160. Other diffusion pump accessories are available on this web site.

These Agilent Varian VHS-400 diffusion vacuum pump Tubular-Style replacement heaters are for use with 380 VAC input power. These heaters pull 2550 Watts, 6.7 Amps and have a room temperature resistance of 56.6 Ohms. These heaters are designed to be operated by 380 VAC, two heaters are required for (5100 Watts of heating power). For heater assembly replacement instructions see page 43 in the instruction manual .pdf below. The Agilent Varian part number for this heater is 647310165 and its location is item #10 in graphic diagram and description below. Other diffusion pump accessories are available on this web site.

These Agilent Varian VHS-400 diffusion vacuum pump Tubular-Style replacement heaters are for use with 480 VAC input power. These heaters pull 2550 Watts, 5.3 Amps and have a room temperature resistance of 90.4 Ohms. These heaters are designed to be operated by 480 VAC, two heaters are required for (5100 Watts of heating power). For heater assembly replacement instructions see page 43 in the instruction manual .pdf below. The Agilent Varian part number for this heater is 647310175 and its location is item #10 in graphic diagram and description below. Other diffusion pump accessories are available on this web site.

Agilent Varian Thermocouple for measuring temperature of diffusion vacuum pumps. One end is connected to the diffusion pump the other end is connected to a temperature gauge. Agilent Varian Part Number 642906115