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Nupro Gas Metering Valves

Gas Flow Control for Vacuum Systems

Overview

Efficient gas flow management is essential for vacuum systems, ensuring optimal performance and safety. The products designed for this purpose offer robust construction and precise regulation capabilities.

Construction and Material

The gas flow control devices are made from 316 stainless steel, providing excellent resistance to corrosion and high temperatures. This material choice ensures durability and reliability in demanding environments.

M-Series Features

The M-Series is specifically designed to regulate medium gas flows at elevated temperatures, with the following specifications:

  • Temperature Range: Up to 200° C
  • Pressure Rating: Up to 1,000 psi
  • Ordering Information: To include the Vernier Handle option, simply add “–MH” to the end of the part number.

S-Series Features

For applications requiring precise control, the S-Series excels with its fine flow regulation capabilities:

  • Pressure Rating: Rated for up to 2,000 psi
  • Ordering Information: To select the Vernier Handle option, append “–VH” to the part number.

Specifications Table

ManufacturerSwagelok
RatesPressure Rating
69.0 bar
1000 PSI
TemperatureMax
204 ºC
400 ºF
Actuator
Type		Manual
Used for
Shut-Off		0

Ordering Table

Drawing Flow Coefficient (Cv) Turns to Open Termination Part Number
Tooltip 0.03 8 to 10 1/4" Swagelok SS-4MA
Tooltip 0.03 8 to 10 1/4" Swagelok SS-4MG
Tooltip 0.03 8 to 10 1/4" VCR SS-4MG-VCR
Tooltip 0.03 8 to 10 1/4" Swagelok SS-4MGD
Tooltip 0.004 8 to 12 1/8" Swagelok SS-SS2-D
Tooltip 0.004 8 to 12 1/4" Swagelok SS-SS4
Tooltip 0.004 8 to 12 1/4" Swagelok SS-SS4-A
Tooltip 0.004 8 to 12 1/4" VCR SS-SVCR4

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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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