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Soft Seated SV Series - NPT

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Inlet x Outlet Size
Piston Ext.
Strahman SV 700
Strahman SV 700


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

Soft Seated SV Series with NPT connection Features:

  • Rugged investment cast body construction for long-lasting service in challenging environments

  • The standard body is 316SS; other materials are also available, such as Alloy 20, Nickel, Hastelloy B or C, Monel, Titanium, Inconel, and other metals by request

  • ANSI CLASS 600

  • Soft seat design meets ANSI Class VI, bubble-tight shutoff

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

  • Dual sealing ring arrangement keeps the valve from leaking into the atmosphere

  • No internal dead spot cavity - the piston fills the valve interior, resulting in a valid live sample every time

  • Precision-machined piston clears out any material that may solidify within the body during regular operation;

  • Standard piston extensions are 0", 2", 4" and 6" plus custom sizes upon request in +/= 1/16" increments

  • Our standard valve is manual, multi-turn hand crank operation; other available options include handwheel, gear operator, pneumatic or hydraulic cylinder, electric, chain wheel, or extended crank options upon request

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. Strahman Drain Valves 3” NB through 12” NB ANSI classes 150, 300, and 600 and 2” NB ANSI classes 300 and 600 comply under Category II liquid service.

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.