850 series
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Pilot Operated Pressure Reducing Valve BUREAU VERITAS Certification BUREAU VERITAS Certification BUREAU VERITAS Certificat

Application Pilot Operated Pressure Reducing Valves are ideal for processes with high and widely varying loads. Higher flow coefficients than similar designs. Hardened stainless steel cobalt-chrome coated nozzle ensures long lasting operation. Pivoting disc ensures sealing and improves shutoff. Individual hydrostatic and seat leakage testing, as well as mechanical tests and metalographic tests guarantee product quality. Test resports are delivered with each order and uploaded in TECVAL'S asset administration software for adequate product traceability.

Main Valve Tríe VAL We ara Operatlonal Reliabllity

Series 850 Regulators are normally closed diaphragm actuated valves. The diaphragm, is displaced by the variable pressure in the diaphragm chamber© . Inlet pressure P2 through the adjustment of the pilot valve regulating screw. Pressure in the main valve diaphragm chamber is controlled by the throttling action of the pilot valve that results from changes in outlet pressure sensed through the Yellow Line tubing. Pilot Valve throttling action acts as a pressure signal amplifier such that a small change in outlet pressure P2 becomes an amplified signal to the diaghragm chamber©, reposition the...

Tsh =Superheated Steam Temp(°F) W = Steam flow (lbs/hr) AP =Pressure drop (Pi - PJ Pi = Inlet pressure (psia) P2 = Outlet pressure (psia)

Sizing Software TECVAL Sizing software ensures adequate regulator selection according to pressure, temperature, flow and other process conditions. T TECVAL We ara Operational Reliabllity

810 Series Direct Acting 820 Series Direct Acting 850 Series Pilot Acting Other TECVAL Products Series VP VP Series Quick Opening VP Series VP Series Slow Opening Automatic Actuation Other TECVAL Products

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