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Soft Seated SV Series - Flanged

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Inlet x Outlet Size
Piston Ext.
Strahman Sampling Valve Flanged
Strahman Sampling Valve Flanged


Our Sampling Valve with a Soft Seat is the original Piston Valve pioneered by Strahman in the early 1920s with a unique design of dual sealing rings. Our Sample Valves provide users with safe, effective, and consistent live product sample extractions from the pipeline under high pressure or vacuum conditions without fear of contamination or internal blockage. Our standard valve is manual, multi-turn hand crank operation. Other available options include handwheel, gear operator, pneumatic or hydraulic cylinder, chain wheel, or extended crank options upon request.

Our line of Accessories further enhances its safety features and functionality. Additionally, Spare Parts are often recommended for routine maintenance.

Soft Seated SV Series with Flanged Connection Features:

  • Rugged investment cast body is 316 SS, ANSI CLASS 600; other materials such as Alloy 20, Nickel, Hastelloy B or C, Monel, Titanium, Inconel, and other metals are also available by request

  • Flanged connection is ANSI CLASS 150 or ANSI CLASS 300 depending on model

  • Flanged inlet x FNPT outlet connection; MNPT inlet x FNPT and Insert connections are available; Socket Weld is available upon request

  • Integral inlet flange connection for applications that prohibit welded flanges is available by request

  • Three standard packing offerings:

    PTFE Maximum Temp. 450°F (200° C)
    MR Maximum Temp. 650°F (340° C)
    GRAPHITE Maximum Temp. 1000°F (530° C)


  • Soft seat design meets ANSI Class VI, bubble-tight shutoff
  • Dual sealing ring arrangement keeps the valve from leaking into the atmosphere

  • Precision-machined piston clears out any material that may solidify within the body during regular operation; No internal dead spot cavity - the piston fills the valve interior, resulting in a valid live sample every time

  • Optional piston extension breaks through scale build-up to prevent contamination or ­­ build-up; Standard piston extensions are 2", 4" and 6" plus custom sizes upon request in +/= 1/16" increments

A Strahman Sampling Valve provides users with safe, effective, and consistent product sample extractions from the pipeline under high pressure or high vacuum conditions without fear of contamination or internal blockage. Strahman Piston-Type Sample Valves comply with the Pressure Equipment Directive (PED) No. 97/23/EC under SEP.

Please note that the above product image is representative of products in this series and while we try to be as accurate as possible, the product you receive may slightly differ depending on valve size. Please refer to data sheets for dimensions and technical drawings, if applicable.
At Strahman, we pride ourselves on serving a wide variety of industries and process applications. We understand that each application is unique, and we are committed to providing custom designs to fit your specific needs. Your satisfaction is our priority. Please CONTACT US. We would be delighted to work with you on custom-engineered solutions that meet your exact requirements.