PV63 PV 63

Spring loaded full lift safety valves with closed bonnet
Inlet: DN 20 to 400, Outlet: DN 32 to 500
PN 16 to 100

The body PN 16 and PN 40 is casted, angle shaped, the inlet nozzle is it's integrated part. The seat ring is firmly pressed into it. The body PN 63 and PN 100, the casted body is provided with forged inlet nozzle with integrated seat. The flange´s dimensions are according to EN 1092-1. The flat disc is equipped with lifting bell which is exposed to pressure of medium when the valve starts to open. The opening force is increased by this way, the result is quick opening of valve. The spring, which causes the closing/sealing force, is designed for specific range of set pressures, the fine setting is made through adjusting screw. The valve is equipped with lever, which serves for manual valve opening/functional test during the normal operating conditions of protected equipment. Because the valves PV 63 are with closed bonnet they can be delivered both in normal (standard) or gas-tight execution.

Seslf-acting full-lift safety valve Series PV 63 is designed and certified as a safety device for automatic protection of pressure equipment (as a boiler, a pressure vessel, a pressure reduction station, a pipeline, etc.) against excessive pressure. The valve meets requirements of EN ISO 4126-1 standard and 97/23/EC (PED) directive.

Process media
Process media The valves of series PV 63 are determined for water, steam, air and other gases and liquids. Chemical composition of medium must be in accordance with used materials of a body and inner parts and with an execution (standard or gas-tight). Working temperature range is from +5°C to +400°C, if the temperature is higher than +350°C, the execution with cooling spacer is recommended.
In case of higher seat tightness demand, the disc with softsealing (EPDM, NBR) is recommended. This execution is limited by max. temperature +120°C.
If the protected medium is liquid, the valve is, regarding the reliable function, offered either as the valve with limited lift (and reduced value of certified coefficient of discharge Kdr or as the full lift valve with soft seat and diaphragm (PN 16 and PN 40 only).

Catalogue sheets

Self-acting full-lift safety valve, spring loaded, angle, flanged,
with closed bonnet Series PV 63