Mark 687 Series Piloted Pressure Reducing Regulator
Critical Low Pressure, High Flow Applications 1-1/2" - 2" (DN40 - DN50); Balanced Plug
The Mark 687 Series is a piloted soft seat regulator for critical pressure reducing applications. It uses balance plug trim with the action of a pilot valve to create a faster, more accurate (meaning less droop as your flows increase) response. this critical pressure reducing regulator with tight shut off provide zero or near-zero leakage when fully closed.
- Easy to maintain and service – remove bottom entry to access plug. Diaphragm is accessible from the top.
- Large effective diaphragm area – for increased accuracy and sensitivity.
- Large orifices and body passages – provides high flow capacities.
- Tight shutoff – ANSI Class VI
- For applications with differential pressures up to 150 psi (10 bar) – on water, air, oil, gas and chemicals
Sizes: 1-1/2″ – 2″ (DN40 – DN50)
Cv (Kv): 1-1/2″ 40 (34); 2″: 50 (43)
Seat: 316SS/PTFE
Body Material: Carbon Steel (ASME SA216 WCB) & Stainless Steel (ASME SA351 CF8M)
End Connection: Threaded & Flanged (ANSI 150#, 300# and DIN PN10/16, PN25/40)
Min & Max Pressure Drop: 25 psi minimum (1,7 bar); 150 psi maximum (10,3 bar)
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