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Manual SS All-Metal Angle Valves (CF Flanged)

Manual Stainless Steel All-Metal Angle Valves (CF Flanged)

This series of TFM manual stainless steel all-metal angle valves is specifically designed for ultra-high vacuum (UHV) and cryogenic applications, where extreme temperature fluctuations prevent the use of elastomer seal valves.

Key Features

  • Approved for Beam Line Facilities: Suitable for use in beam line applications.
  • Wide Temperature Operating Range: Functions effectively between 450°C and -250°C.
  • Durable Seal Design: Maximum temperature bakeouts may necessitate poppet seal replacement after 50 cycles, while hundreds of cycles are possible with moderate bakeouts. A dial indicator on top of the valve indicates the correct torque for closure and when the seal needs replacement.

Additional Specifications

  • Operable at cryogenic temperatures.
  • Vacuum rated to below 10⁻¹¹ torr.
  • Constructed entirely of stainless steel.
  • Electropolished both inside and out for enhanced cleanliness and performance.
  • Features extended-life stainless steel bellows.
  • Easily replaceable copper poppet seal.
  • Pulled port bodies provide higher conductance.
  • Assembled in a clean room environment.
  • Leak rate of 10⁻¹¹ standard cc/sec or less.
  • Available with 1-1/3″, 2-3/4″, and 4-1/2″ O.D. CF flanges.
  • Equipped with a dial indicator for proper closure.

Seal Replacement Procedure

The poppet seal can be easily replaced with a slotted screwdriver. After replacing the seal, the valve must be torqued to a higher value than during normal operation to ensure proper seating. After closing the valve to its standard torque value, loosen the set screw beneath the closure nut, rotate the indicator to the furthest counter-clockwise line on top of the valve, and retighten the set screw. This mark can be used for nearly indefinite closure.

Periodic checks with a torque wrench will help identify seat wear and determine the proper alignment mark. When the indicator reaches the last mark, seal replacement is recommended. Be sure not to exceed the maximum torque specifications.

 

Specifications Table

ManufacturerTFM
PressureTorr
1.000 x 10-11 Torr
mbar
7.500 x 10-12 mbar
RatesHelium Leak Rate
1.000 x 10-10 mbar*L/s
7.520 x 10-11 Torr*L/s
TemperatureBakeable Closed
300 ºC
572 ºFBakeable Open
450 ºC
842 ºF
Cycle
Life		10,000
Bonnet
Seal Type		Copper
Valve Body
Material		304L SS
Valve Seal
Material		Copper

Ordering Table

New wpDataTable

Drawing Flange Size Bonnet Seal Type Note Part Number
Tooltip DN16CF (1.33" OD) Copper 1 VZCR20R
Tooltip DN35CF-DN40CF (2.75" OD) Copper — VZCR40R

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FAQ

Tube fittings are designed for tubes (measured by outside diameter and wall thickness) used in high-pressure and instrumentation applications, whereas pipe fittings are for pipes (identified by nominal pipe size) primarily used in fluid transport.

 

Common valve types include ball valves, gate valves, check valves, butterfly valves, and globe valves. Each serves a specific function—from quick shutoff (ball/gate valves) to flow regulation (globe valves).

 

  • For tubing, measure the outside diameter; for pipes, refer to the nominal pipe size (using conversion charts if needed). Always match the valve or fitting size to your pipe’s dimensions and flow requirements.

  • Frequently used thread types include NPT (National Pipe Tapered), BSP (British Standard Pipe), and UNC, along with slip-fit options that rely on compression or fusion rather than threads.

Interchangeability depends on manufacturer specifications and certification. Always verify compatibility via manufacturer guides or certified interchangeability charts.

 

  • A coupling is a short, straight fitting used to join two pipes or tubes. It provides a secure, leak-tight connection and can sometimes serve to extend or repair piping runs.

Consider valve type, pressure and temperature ratings, material compatibility with your fluid, actuation method (manual or automatic), and maintenance requirements.

 

  • Valves regulate flow by opening, closing, or partially obstructing the pathway. Their mechanisms (such as the rotation of a ball or the linear movement of a gate) determine the speed and precision of flow control.

  • A flange is a flat, circular component used to connect pipes, valves, or other equipment. Bolted together with gaskets, flanges provide a secure, leak-proof joint that facilitates both assembly and maintenance.

  • Manual valves require physical operation via handles or levers, whereas actuated valves use mechanisms—pneumatic, electric, or hydraulic—to open and close automatically or remotely.

  • Issues include leaks caused by improper installation, over-tightening, degraded seals, material incompatibility, and fatigue from repeated cycling. Regular inspection and proper installation practices help mitigate these problems.

Regular maintenance involves periodic inspections, cleaning or replacing worn seals, ensuring proper torque during installation, and adhering to manufacturer guidelines and local plumbing codes to preserve system integrity.

 

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