SOFT START VACUUM VALVES. Vacuum Valves. Two-Stage Valves

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1 SOFT START AUU AES W W W. K S I S T. O acuum alves Two-Stage alves

2 Features and Benefits Provides soft pumpdown and isolation of your vacuum system Reduces particulate contamination during early turbulent pumpdown Adjustable conductance for variable pumpdown speed Eliminates the need for small bypass lines that clog easily Bellows-sealed poppet valves Bellows are formed for less particle trapping and a longer cycle life Angle or inline option Available in five port diameters ranging from 1 to 4 inches hoice of KF flanges, F flanges, or weld stubs, as well as ISO-Universal flanges for larger port sizes cycle life. The bellows stroke length is optimized to ensure a longer cycle life while maintaining a high conductance. Elastomer seal choices include iton and hemraz, which has a higher chemical resistance. acuum exposed parts are clean and free of lubricants. Options include air solenoids for electropneumatic control and a limit switch for the main valve for remote indication of valve position (open or closed). If a heated Two-Stage alve is required, please refer to our Jalapeño alve brochure. For more information, call KS Instruments at Or visit our website at Applications To achieve a soft pumpdown and isolate your vacuum system, KS recommends its Two-Stage alve. It integrates a small bypass valve into an isolation valve, significantly simplifying system setup and reducing costs. The Two-Stage alve is best suited for high vacuum applications, specifically semiconductor or optical processing for which a cleaner environment is necessary. With the integrated slow pumpdown feature, turbulent flow is diminished preventing contamination buildup and damage to your product. Description Traditionally, the method to soft start a vacuum system had been to run a secondary bypass line with a small orifice valve around the main vacuum isolation valve. The use of bypass lines in semiconductor nitride and etch processes requires special engineered designs that are hardware intensive. These lines also clog easily and result in higher costs. KS has designed the Two-Stage alve specifically to accommodate space constraints and soft start the system in two steps. In the first stage, the bypass valve allows slow pumping from atmospheric pressure to a user-specified vacuum pressure. In the second stage, the main valve opens, allowing use of full pumping speed. The Two-Stage alve features a removable small orifice within the bypass valve to vary slow pump speeds. The standard bypass orifice diameter is 0. inches. See specifications for other available sizes. A normally closed, pneumatically actuated valve at both stages, the Two-Stage alve is offered with an optional thumbscrew or micrometer head for the bypass valve. This allows for flow adjustment by limiting the stroke. The body is made of high grade, corrosion resistant, 304 stainless steel using clean, tungsten inert gas (TIG) welding for significantly fewer entrapment areas, resulting in less contaminant build-up. A formed 321 stainless steel bellows, not edge-welded, prevents outgassing, virtual leaks, and particle entrapment between bellows convolutions and extends the valve s Specifications - ain Port Size in. (W) 1.0 (25) 1.5 (40) 2.0 (50) 3.0 (80) 4.0 (100) Angle 3.0 (1.4) 6.0 (2.7) 13.8 (6.3) 20.4 (9.3) 26.3 (11.9) Weight lb (kg) onductance onductance (iters/second) Specifications acuum Range Suggested ominal Pressure Supply Helium eak Rate aximum Bakeout Temp. imit Rating Single Pole, Single Throw In-ine 3.0 (1.4) 6.6 (3.0) 17.5 (8.0) 28.5 (13.0) 38.5 (17.5) Pressure (Torr) Specifications - s Available Pneumatic ylinder Displacement olume Approximate Pneumatic losing Time Blow-By Pressure aximum Internal Spring losing Pressure ylinder olume in 3 (cm 3 ) 3.6 (59) 4.8 (79) 13.3 (218) 27.6 (453) 27.6 (453) Atmosphere to 1.0 x 10-9 Torr 65 psig 1.0 x 10-9 std cc/sec Body 5A A 5A - 30 D Actuation Time (msec) Opening (closing) 500 (1,000) 1,000 (2,000) 1,000 (2,000) 2,000 (2,000) 2,000 (2,000) Blow-By Pressure psia W 100 W 80 W 50 W 40 W 25.,.063,.125,.187 and custom 0.25 in 3, (4.1 cm 3 ) 100 msec 45 psia 40 psia ax. Internal Spring losing Pressure psia

3 W 25 Angle Dimensions W 25 Inline Dimensions A 2.47 (63) 2.61 (66) 2.47 (63) B 1.97 (50) 2.02 (51) 1.88 (48) A 4.97 (126) 5.62 (143) 5.37 (136) W 25 Two-Stage alve Ordering Information Body onfiguration imit onfiguration oltage* AK KF 25 Angle IK KF 25 Inline AT 1 Tube Angle IT 1 Tube Inline A F 2 1 /8 Angle I F 2 1 /8 Inline w/ imit w/o imit iton hemraz 50/60 Hz A 50/60 Hz A 50/60 Hz 220A 50/60 Hz : Add the price of the options to the price of the body. Sample part number: AK---. * includes one solenoid each for the bypass and main valve.

4 W 40 Angle Dimensions W 40 Inline Dimensions A 4.00 (102) 4.03 (102) 3.85 (98) B 3.00 (76) 3.03 (76) 3.85 (98) A (305) (307) (297) W 40 Two-Stage alve Ordering Information Body onfiguration imit onfiguration oltage* AK KF 40 Angle IK KF 40 Inline AT 1 1 /2 Tube Angle IT 1 1 /2 Tube Inline A F 2 3 /4 Angle I F 2 3 /4 Inline w/ imit w/o imit iton hemraz 50/60 Hz A 50/60 Hz A 50/60 Hz 220A 50/60 Hz : Add the price of the options to the price of the body. Sample part number: AK---. * includes one solenoid each for the bypass and main valve.

5 W 50 Angle Dimensions W 50 Inline Dimensions A 4.75 (121) 4.81 (122) 4.61 (117) B 3.50 (89) 3.55 (90) 3.35 (85) A (305) (307) (297) W 50 Two-Stage alve Ordering Information Body onfiguration imit onfiguration oltage* AK KF 50 Angle IK KF 50 Inline AT 2 Tube Angle IT 2 Tube Inline A F 3 3 /8 Angle I F 3 3 /8 Inline w/ imit w/o imit iton hemraz 50/60 Hz A 50/60 Hz A 50/60 Hz 220A 50/60 Hz : Add the price of the options to the price of the body. Sample part number: AK---. * includes one solenoid each for the bypass and main valve.

6 W 80 Angle Dimensions W 80 Inline Dimensions KF/F F Tube A 5.50 (140) 5.59 (142) 5.25 (134) KF/F F Tube B 4.00 (102) 4.09 (104) 3.75 (95) A (457) (462) (444) W 80 Two-Stage alve Ordering Information Body onfiguration imit onfiguration oltage* A F 80 Angle I F 80 Inline AK KF 80 Angle IK KF 80 Inline AT 3 Tube Angle IT 3 Tube Inline A F 4 5 /8 Angle I F 4 5 /8 Inline w/ imit w/o imit iton hemraz 50/60 Hz A 50/60 Hz A 50/60 Hz 220A 50/60 Hz : Add the price of the options to the price of the body. Sample part number: AK---. * includes one solenoid each for the bypass and main valve.

7 W 100 Angle Dimensions W 100 Inline Dimensions KF/F F Tube A 6.50 (165) 6.65 (169) 6.25 (159) KF/F F Tube B 4.88 (124) 5.03 (128) 4.63 (118) A (457) (465) (444) W 100 Two-Stage alve Ordering Information Body onfiguration imit onfiguration oltage* A F 100 Angle I F 100 Inline AK KF 100 Angle IK KF 100 Inline AT 4 Tube Angle IT 4 Tube Inline A 6 F Angle I 6 F Inline w/ imit w/o imit iton hemraz 50/60 Hz A 50/60 Hz A 50/60 Hz 220A 50/60 Hz : Add the price of the options to the price of the body. Sample part number: AK---. * includes one solenoid each for the bypass and main valve.

8 Spare s Port Size in (mm) 1.0 (25) 1.5 (40) 2.0 (50) 3.0 (80) 4.0 (100) ain alve Internals, iton Seals imit iton Seal Set * hemraz Seal Set * * In each set, the bonnet and nosepiece seals are of the material specified, and all other seals are of their original material. Replacement Solenoid alves oltage and Frequency 50/60 Hz 12 D A 50/60 Hz A 50/60 Hz 220A 50/60 Hz Watts alve Spare s, iton Seals icrometer Internal Rebuild Kits onversion Kits ** ** onversion kits are for converting one bypass actuator type to another (i.e. thumbscrew to micrometer head). KS Global quarters 2 Tech Drive, Suite 201 Andover, A Tel: Tel: (in USA) Web: KS acuum alves Six Shattuck Road Andover, A Tel: Two-Stage alves - 9/ KS Instruments, Inc. All rights reserved. KS products provided subject to the US Export Regulations. Diversion or transfer contrary to US law is prohibited. Specifications are subject to change without notice. mksinst is a trademark of KS Instruments, Inc.

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