All Metal Valves
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Valves Manufactured contain carefully selected materials to reduce outgassing and give high preformance in UHV and process environments. Valve bodies and all parts exposed to the vacuum system are fabricated from 300 series stainless steel. We employ highly skilled staff using state of the art manufacturing equipment assuring precisly fabricated valves to the highest industrial standards.
Welding is carried out on the vacuum side of joints whereever possible to prevent virtual leaks.
All valves are helium leak checked at various stages of manufacturing and after final assembly to at least 1x10-10 mbar l/s-1
The quality of manufacture and operational effectiveness of valves has been constantly demonstrated in high and ultra-high vacuum systems throughout the world. Download here PDF for more information
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Specification VMD |
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Valves |
Operation Pressure: |
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Atm. To 1x10-10 mbar |
Bakeout temperature |
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max: 450°C Open / 300°C Closed |
Leak rate to Atm.: |
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<1x10-10 mbar l/s-
1 |
Leak rate to Across seat: |
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<1x10-10 mbar l/s-
1 |
Mat. exposed to vacuum: |
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SST 304, SST 316L, OFHC Copper |
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Series |
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Conductance l/s-1 |
Close torque kg-cm |
VMD19 |
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10 |
First 150, max. 250 |
VMD38 |
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25 |
First 300, max. 600 |
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All Metal Leak Valves
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The demountable all metal leak valve is manufactured from 300 series stainless steel to UHV standards, suitable for controlled admission of gases over a wide pressure range.
Fine control is achieve via the graduated thimble and lever. The lever, used as a reducing mechanism, gives controlled leak rates ranging to 10-11 mbar l/s-1. Simple rugged design has produced a reliable valve which can be fitted to vacuum systems with absolute confidence.
The all metal leak valve by virtue of its design withstands bakeout temperatures associated with UHV systems without detriment to performance.
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Specification VML |
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All Metal Leak Valve |
Pressure range |
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1000 to below 10-11 mbar |
Operating temperature |
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-20° to +200°C |
Bakeout temperature |
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250°C Closed 450°C Open |
Operating media Any gas compatible with |
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SST 304 and OFHC Copper |
Vacuum Seal |
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Stainless Steel diaphragm |
Construction materials |
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SST 304, OFHC Copper (vacuum) Hardened tool steel (lever) |
Operation |
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Micrometer style screw for precise, repeatable operation |
Terminations |
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CF16 or CF35 conflat flanges
as standard, other flanges
to order |
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Ball Valves
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Stainless Steel ball valves are cost effective straight through high conductance valves. Their simple, robust design provides high reliability in low vacuum applications. Ball vales are commonly used on CVD equipment downstream from the chamber or vacuum pump to isolate traps or abatement tools. A quarter-turn of the handle quickly switches the valve from open to close. Hositrad`s ball valves offers straight- through, unimpeded flow with minimal space requirements, and they would be applied for high pressure, high temperature environment.
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Specifications |
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Ball Valves |
Body |
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SST 316 |
Ball |
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SST 316 |
Operation |
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1/4 Turn Manual open and close |
Flange |
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KF |
Seal |
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Viton, PTFE |
Leak Rate |
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9.0 x 10-9 mbar-L/sec |
Max. Pressure |
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3.92 Bar |
Operating Temperature |
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150 °C Max |
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Angle Valves
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Angle valve is one type of the poppet valves. When the poppet is moved toward the top of the valve the internal body cavity is open to the system andd flow is unimpeded (maximum conductance). Once the actuator moves the poppet to the bottom of the valve an elastomer sealing ring is compressed onto the sealing surface of the lower body of the valve. This action creates a vacuum tight seal and stops the flow. Hositrad offer a wide variety of valve types in a comprehensive range of sizes. They have manually and pneumatically, and with bellows. Port terminations are available in KF, ISO, CF, and Tube End. Hositrad designs all series angle valves suited for vacuum applications with venting processes, high vacuum applications in pumping systems, semiconductor technology, research systems, etc.
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Specifications |
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Angle Valves |
Body |
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SST 304 (Other available) |
Poppet |
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SST 304 (Other available) |
Port O.D |
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3/4 - 3 inch |
Bellows |
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Welded Stainless Steel |
Bellows |
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Welded AM 350 (option) |
Solenoid |
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Option |
Position indicator |
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Option |
Seal |
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Viton O`ring |
Leak rate |
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2x 10-9 std.cc./second |
Pressure Range |
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2x 10-9 to 1130mbar Viton Seal Bonnet |
Max Pres. before opening |
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1.2 Bar |
Operating air pres. |
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4 - 6.5 kg/cm2 |
Cycles until service |
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16 to 50 - 500,000 |
Bake-out Limitation |
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150ºC Viton Seal Bonnet |
Bakeable option |
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315ºC Kalrez |
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Y-Inline Valves
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Y-inline valve is one type of the poppet valves. When the poppet is moved toward the top of the valve the internal body cavity is open to the system and flow is unimpeded (maximum conductance). Once the actuator moves the poppet to the bottom of the valve an elastomer sealing ring is compressed onto the sealing surface of the lower body of the valve. This action creates a vacuum tight seal and stops the flow. Hositrad offer a wide variety of valve types in a comprehensive range of sizes. They are manually and pneumatically, with bellows and without bellows. Port terminations are available in KF, ISO, CF, and Tube End. Hositrad designs all series angle valves suited for vacuum applications with venting processes , high vacuum applications in pumping systems, semiconductor technology, research systems, etc.
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Specifications |
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Y-Inline Valves |
Body |
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SST 304 |
Poppet |
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SST 304 |
Port O.D |
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3/4 - 2 inch |
Bellows Welded |
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Welded Stainless Steel |
Bellows |
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Welded AM 350 (option) |
Solenoid |
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Option |
Position indicator |
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Option |
Seal |
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Viton O`ring |
Leak rate |
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2x 10-9 std.cc./second |
Pressure Range |
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2x 10-9 to 1130mbar Viton Seal Bonnet |
Max Pres. before opening |
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1.2 Bar |
Operating air pres. |
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4 - 6.5 kg/cm2 |
Cycles until service |
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16 to 50 - 500,000 |
Bake-out Limitation |
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150ºC Viton Seal Bonnet |
Bakeable option |
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315ºC Kalrez |
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Butterfly Valves
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Download here PDF for more information |
Straight Through Valves
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Download here PDF for more information
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Gate Valves
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Gate valve assemblies consist of three key components: an actuator, a carriage/gate and a valvebody. Hositrad offers gate valves that have two series, one is HV series and the other is UHV series.
HV series valves are rotary action, linear travel gate valves. The gate carriage moves in the valve body on a set of wheels, moved back and forth by a manual or pneumatically-actuated valve stem.
Hositrad offer a wide variety of valve types in a comprehensive range of sizes. Hositrad gate valves have manually and pneumatically, with bellows and without bellows. And the gate valves are available with KF, ISO, ANSI, JIS, and CF flange. Hositrad designs all series gate valves suited for vacuum
applications with venting processes , high vacuum applications in pumping systems, semiconductortechnology, research systems, etc
Transition Slit Valves
The Transfer Slit Valve is a gate-like mechanism designed to connect two sealed Chambers for a purpose of transfering objects from one to the other Chamber. The Slit Valves features single axis motion, ensuring smooth and particle-free movement with no vibration. It's motion provides a secure seal in the closed position, even in the event of power and air supply failure during operation. With a durable, maintainance-free design capable of up to 5 million cycles, the Slit Vlave is built to last. It's simple modulair design also makes it easy to service if required.
Features
* Able to remain closed against large pressure differences. * Maintains closed position in the event of power or air loss. * Vulcanized Seal for maintainance-free operation. * >5 million cycles between mantainance. * Suitable for SEMI Wafer processing applications up to 450mm.
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Specifications |
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Gate valves |
Material |
| Body - SST 304
Carriage - A6061T6
Gate - SST 304 |
Life Circle |
| Size under 4" (included) - 100,000 cycles
Size above 4" --------------- 50,000 cycles |
Helium Leak rates at 1 atm differential |
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<2×10-9std cc/sec for Viton bonnet seal
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Bakeable Temperature |
| Open - 150ºC Viton bonnet seal
Close - 200ºC Viton bonnet seal |
Pressure range |
| 10-8 mbar ~ATM |
Maximum △P |
| 25 mbar before opening |
Standard Seal |
| Gate ---- Viton O`ring
Bonnet - Buna N O`ring |
Size |
| 2" to 8" |
Actuator |
| Electro - Pneumatic or Manual |
Surface treatment |
| Scotch Polished |
Options |
| A. Position indicator
B. Pneumatic control solenoid Valve
C. Roughing port
D. Other material Gate O`ring seal |
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