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Stainless Steel Ball Valves (Pneumatic)

Stainless Steel Ball Valves for High- and Coarse-Vacuum Service

These stainless steel ball valves are specifically designed for high- and coarse-vacuum applications, ensuring optimal performance and reliability.

Key Features

  • Minimal Leak Rate: Maintains a leak rate of less than 1 x 10⁻⁹ standard cc/sec of helium (He).
  • Replaceable Seals: Equipped with PTFE seats and fluorocarbon seals that are easily replaceable without needing to demount the valve.
  • Unrestricted Bore: When open, these valves provide an unrestricted bore, allowing for high gas conductance, making them ideal for low-cost sample entry locks.
  • Effective Closure: When closed, the main bore is evacuated through a side vent hole, ensuring vacuum integrity and efficiency.

Specifications Table

ManufacturerTFM
PressureTorr
Min: 1.000 x 10-8 Torr
Max: 760 Torrmbar
Min: 1.330 x 10-8 mbar
Max: 1013 mbar
RatesHelium Leak Rate
1.010 x 10-9 mbar*L/s
1.000 x 10-9 sccs
7.600 x 10-10 Torr*L/s
TemperatureBakeable
150 ºC
302 ºFIntermittent Bake
200 ºC
392 ºF
Shaft Seal
Material		Shaft with Fluorocarbon (FKM) Seal
Actuator
Type		Pneumatic
Valve Body
Material		316L SS
Valve Seal
Material		Teflon

Ordering Table

Drawing Flange Size Ball Size (inches) Part Number
Tooltip KF16 (1.18" OD) 0.56 BVB0075PVQF-AA
Tooltip KF16 (1.18" OD) 0.56 BVB0075PVQF-AS
Tooltip KF25 (1.57" OD) 0.81 BVC0100PVQF-AA
Tooltip KF25 (1.57" OD) 0.81 BVC0100PVQF-AS
Tooltip KF40 (2.16" OD) 1.25 BVD0150PVQF-AA
Tooltip KF40 (2.16" OD) 1.25 BVD0150PVQF-AS
Tooltip KF50 (2.95" OD) 1.5 BVE0200PVQF-AA
Tooltip KF50 (2.95" OD) 1.5 BVE0200PVQF-AS
Tooltip KF50 (2.95" OD) 1.87 BVF0200PVQF-AA
Tooltip KF50 (2.95" OD) 1.87 BVF0200PVQF-AS

 

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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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