Low Pressure Double Seated, High Capacity

The Mark 608DS is a double-seated, self-operated gas regulator for use in tank blanketing applications. The double seated design allows the Mark 608DS to handle increased flow and higher pressure drops than similarly sized single seat valve types while maintaining ANSI Class VI shutoff.

Features & Benefits
  • Inlet pressures up to 150 psi (10 bar)
  • External sensing line with FNPT connection
  • Operating Temperatures – -15°F to 350°F (-26°C to 177°C)
  • ANSI Class VI shutoff

Sizes: 1-1/2″ – 2″ (DN40 – DN50)

Body Material: Carbon Steel, Stainless Steel

End Connection: ANSI Class 150/300 Integrally Flanged

Diaphragm: Buna-N, Viton, EPDM

Cv (Kv): 1-1/2″: 5 cv, orifice 9/16″ (DN40: 4,3 Kv, orifice 14mm);
2″: 17 Cv, orifice 1″ (DN50: 14, 7 Kv, orifice 26mm)

Max Inlet Pressure: 150 psi (10,3 bar)


Tank Blanketing Reference Guide

Need a quick reference guide showing the quick specs of our most popular tank blanketing valves? We have you covered! Download our Reference Guide.

What Is Tank Blanketing?

Learn the basics about tank blanketing. Read on!

What is Tank Blanketing (Part 2)

Learn more about tank blanketing.


CRN (Canadian Registration Number)
ATEX Certified

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