These Varian Agilent High Throughput models include the series HS-16, HS-20, HS-32 and NHS-35. This is the NHS-35 diffusion high throughput vacuum pump. They are the primary industrial standard for high vacuum pumping mechanism. The Agilent Varian NHS-35 diffusion pumps have a 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 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 NHS 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.

These Varian Agilent High Throughput models include the series HS-16, HS-20, HS-32 and NHS-35. This is the NHS-35 diffusion high throughput vacuum pump. They are the primary industrial standard for high vacuum pumping mechanism. The Agilent Varian NHS-35 diffusion pumps have a 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 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 NHS 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. The Halo Baffle stops backstreaming as effectively as an optically dense baffle, yet it retains 60% of the pump’s speed.

These Varian Agilent High Throughput models include the series HS-16, HS-20, HS-32 and NHS-35. This is the NHS-35 diffusion high throughput vacuum pump. They are the primary industrial standard for high vacuum pumping mechanism. The Agilent Varian NHS-35 diffusion pumps have a 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 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 NHS 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.

These Varian Agilent High Throughput models include the series HS-16, HS-20, HS-32 and NHS-35. This is the NHS-35 diffusion high throughput vacuum pump. They are the primary industrial standard for high vacuum pumping mechanism. The Agilent Varian NHS-35 diffusion pumps have a 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 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 NHS 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. The Halo Baffle stops backstreaming as effectively as an optically dense baffle, yet it retains 60% of the pump’s speed.

These Varian Agilent High Throughput models include the series HS-16, HS-20, HS-32 and NHS-35. This is the NHS-35 diffusion high throughput vacuum pump. They are the primary industrial standard for high vacuum pumping mechanism. The Agilent Varian NHS-35 diffusion pumps have a 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 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 NHS 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.

These Varian Agilent High Throughput models include the series HS-16, HS-20, HS-32 and NHS-35. This is the NHS-35 diffusion high throughput vacuum pump. They are the primary industrial standard for high vacuum pumping mechanism. The Agilent Varian NHS-35 diffusion pumps have a 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 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 NHS 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. The Halo Baffle stops backstreaming as effectively as an optically dense baffle, yet it retains 60% of the pump’s speed.

These Varian Agilent High Throughput models include the series HS-16, HS-20, HS-32 and NHS-35. This is the NHS-35 diffusion high throughput vacuum pump. They are the primary industrial standard for high vacuum pumping mechanism. The Agilent Varian NHS-35 diffusion pumps have a 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 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 NHS 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.

These Varian Agilent High Throughput models include the series HS-16, HS-20, HS-32 and NHS-35. This is the NHS-35 diffusion high throughput vacuum pump. They are the primary industrial standard for high vacuum pumping mechanism. The Agilent Varian NHS-35 diffusion pumps have a 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 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 NHS 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. The Halo Baffle stops backstreaming as effectively as an optically dense baffle, yet it retains 60% of the pump’s speed.

These Varian Agilent High Throughput models include the series HS-16, HS-20, HS-32 and NHS-35. This is the NHS-35 diffusion high throughput vacuum pump. They are the primary industrial standard for high vacuum pumping mechanism. The Agilent Varian NHS-35 diffusion pumps have a 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 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 NHS 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.

These Varian Agilent High Throughput models include the series HS-16, HS-20, HS-32 and NHS-35. This is the NHS-35 diffusion high throughput vacuum pump. They are the primary industrial standard for high vacuum pumping mechanism. The Agilent Varian NHS-35 diffusion pumps have a 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 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 NHS 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. The Halo Baffle stops backstreaming as effectively as an optically dense baffle, yet it retains 60% of the pump’s speed.

These Varian Agilent High Throughput models include the series HS-16, HS-20, HS-32 and NHS-35. This is the NHS-35 diffusion high throughput vacuum pump. They are the primary industrial standard for high vacuum pumping mechanism. The Agilent Varian NHS-35 diffusion pumps have a 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 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 NHS 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.

Maximum Pumping Speed of 50,000 l/s Air, 62,500 l/s Helium, Agilent Varian These Varian Agilent High Throughput models include the series HS-16, HS-20, HS-32 and NHS-35. This is the NHS-35 diffusion high throughput vacuum pump. They are the primary industrial standard for high vacuum pumping mechanism. The Agilent Varian NHS-35 diffusion pumps have a 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 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 NHS 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. The Halo Baffle stops backstreaming as effectively as an optically dense baffle, yet it retains 60% of the pump’s speed.

These Agilent Varian NHS-35 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 NHS-35 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 K1857335.

These Agilent Varian NHS-35 diffusion pump replacement foreline baffle assemblies are OEM Agilent Varian replacement parts with part number F1744301. 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 NHS-35 diffusion pump roughing line arm noted by balloon #5 in the illustration below.

These Agilent Varian NHS-35 diffusion pump jet assembly are OEM Agilent Varian replacement parts for the NHS-35 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 NHS-35 diffusion pump having part number PN F1971302, see item #3 in the diagram exploded view & parts illustration below.

These Agilent Varian NHS-35 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 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 NHS-35 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 standard cold caps are OEM original Agilent Varian replacement parts with part number 81437301.

These Agilent Varian NHS-35 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 NHS-35 diffusion vacuum pump. These are original OEM Agilent Varian replacement parts for the NSH-35 diffusion pump having part number L8839301, see item #2 in the diagram exploded view & parts illustration below.

These Agilent Varian NHS-35 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 NHS-35 diffusion vacuum pump. These are original OEM Agilent Varian replacement parts for the NHS-35 diffusion pump having part number L8840301, see item #2 in the diagram exploded view & parts illustration below.

This is the Agilent Varian NHS32, NHS-32 in. (ASA 35 in.) Diffusion Pump O-Ring Kit. O-Ring Kit Contains: 1 Butyl inlet flange O-ring, ASA 35 inch 1 Foreline flange O-ring, ASA 6 inch 8 Viton fill and drain O-rings 4 Viton O-rings 1 Sight glass O-ring 1 Graphite sight glass gasket

This is the Agilent Varian NHS-35 Diffusion Pump, Inlet O-Ring for ASA 35 in. ASA Nominal value.

This is the Agilent Varian NHS-35 Diffusion Pump LF ISO 200K foreline outlet O-Ring.

This is the Agilent Varian NHS-35, ISO 1000F Inlet O-Ring.

This is a replacement Oil Drain Plug. Fits the Agilent Varian NHS-35 Diffusion Pump. For location of the oil drain plug see figure #7 (diagram exploded view & parts illustration) below.

This is a replacement Oil Sight Glass Service Kit. Fits the Agilent Varian NHS-35 Diffusion Pump. For location of the sight glass kit see item #7 on (diagram exploded view & parts illustration) below. For pumps built before OCT. 1995.

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.

This is a replacement heater nickle wire, 10 AWG, 196 inches long. Fits the Agilent Varian NHS-35 Diffusion Pump. For location of the heater wire see figure #10 (diagram exploded view & parts illustration) below.

This is a replacement heater insulation blanket. Fits the Agilent Varian NHS-35 Diffusion Pump. 3 pieces Cerablanket, 0.50 inch thick. For location of the insulation blanket see item #14 (diagram exploded view & parts illustration) below.

This is a replacement clamping plate.(1 each) Fits the Agilent Varian NHS-35 Diffusion Pump. 6 required per pump. For location of the clamping plate see item #13 (diagram exploded view & parts illustration) below.

This is the Agilent Varian NHS-35 Diffusion Pump Heat Shield.

This is a replacement heater insulation blanket. Fits the Agilent Varian NHS-35 Diffusion Pump. 3 pieces Cerablanket, 0.50 inch thick. For location of the insulation blanket see item #13 (diagram exploded view & parts illustration) below.

This is a replacement upper thermal (water) switch. Fits the Agilent Varian NHS-35 Diffusion Pump. Set at 200º F, 93º C. For location of the upper thermal switch see figure #8 (diagram exploded view & parts illustration) below.

This is a replacement lower thermal (boiler) switch. Fits the Agilent Varian NHS-35 Diffusion Pump. Set at 600º F, 316º C. For location of the upper thermal switch see figure #9 (diagram exploded view & parts illustration) below.

This is the NHS-35 Diffusion Pump 240/400/440 VAC Heater Retrofit Kit. Fits the Agilent Varian NHS-35 Diffusion Pump. (for pumps built before May 1990) Clamping plates not included.

This is the NHS-35 Diffusion Pump 415 VAC Heater Retrofit Kit. Fits the Agilent Varian NHS-35 Diffusion Pump. (for pumps built before May 1990) Clamping plates not included.

This is the NHS-35 Diffusion Pump 480 VAC Heater Retrofit Kit. Fits the Agilent Varian NHS-35 Diffusion Pump. (for pumps built before May 1990) Clamping plates not included.

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.

This is a replacement heater element no leads, 240/480V, 4000 W. (1 each) Fits the Agilent Varian NHS-35 Diffusion Pump. (Used on pumps built before May 1990) For location of the heater element see item #11 (diagram exploded view & parts illustration) below. (6 required per pump)

This is a replacement heater element with leads, 240/480V, 4000 W. (1 each) Fits the Agilent Varian NHS-35 Diffusion Pump. For location of the heater element see item #11 (diagram exploded view & parts illustration) below. (6 required per pump)

This is a replacement heater element with leads, 240/480V, 4000 W. (1 each) Fits the Agilent Varian NHS-35 Diffusion Pump. For location of the heater element see item #11 (diagram exploded view & parts illustration) below. (6 required per pump)

This is a replacement heater element with leads, 400V, 4000 W. (1 each) Fits the Agilent Varian NHS-35 Diffusion Pump. For location of the heater element see item #11 (diagram exploded view & parts illustration) below. (6 required per pump)

This is a replacement heater element with leads, 440V, 4000 W. (1 each) Fits the Agilent Varian NHS-35 Diffusion Pump. For location of the heater element see item #11 (diagram exploded view & parts illustration) below. (6 required per pump)