Catalogo 820 2016
7Pages

írECVAL We are Operational Reliability Direct Acting Steam PRV

Series 820 Direct Acting SPECIFICATIONS Main Advantages 1. Compact, durable design for higher flow requirements. 2. Range of sizes after required sensitivity. 4. Quality assurance: 5. Metalography, spectometry and individual hydrostatic and leakage testing. 6. Complete product traceability through test register in product data sheet. Diaphragm chamber Grey iron, ductile iron or steel construction. Standard sizes: 6”, 8”, 10” and 15”, according to required response (sensitivity). Bonnet Provides support to diaphragm and guides valve spring. Spring Heat treated and color codified to...

OPERATING PRINCIPLE Steam passes through pilot line until it reaches actuation chamber were it condenses, filling the chamber and pilot line up to siphon, thus outlet pressure (P2) is communicated to diaphragm. Actuation chamber Inlet pressure (P1) is regulated to outlet pressure (P2) by positioning metal disc to seat depending on required demand. FOR CERO FLOW When outlet pressure (P2) is at its maximum, spring compresses forcing metal disc descent until complete seal is achieved. Pilot line Spring force Needle valve FOR MAXIMUN FLOW When outlet pressure (P2) is at its minimum, force of...

Series 820 Direct Acting With the use of the following formulas, and using the Cv value as input, valve capacity for steam can be calculated: CRITICAL FLOW SUBCRITICAL FLOW In these conditions flow is throttled and outlet pressure (P2) does not affect flow. When outlet pressure (P2) increases, flow reduces and when outlet pressure (P2) decreases flow increases. Capacity "W" is defined as: Wmax. = Cv (P + 14,7) 0.547 PRODUCT ID REFERENCE GUIDE Body material Green V Black N INSTALLATION Pressure gauge (P2) 820 series regulator valve Safety relief valve steam trap

Chamber & green Chamber & black «j® 1S 1 color spring color spring Inlet pressure

Series 820 Direct Acting Green Spnng "Btark-Sprmy Chamber & green color spring Chamber & black color spring Regulated Pressure (PSIG) Inlet pressure

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