A46Y Pilot Operated Safety Valve (POSV), WCB, CF8, CF8M
Shanghai Shinjo Valve Co., Ltd.
Pompe Sommerse, Pompe Centrifughe, Valvole Di Ritegno
Smaller package on the larger pipe sizes.
More options for control.
Seals more tightly as the system pressure approaches but does not reach set pressure.
Control pilot can be mounted remotely.
Some designs allow for changes in orifice size within the main valve.
Codes and Standards:
ASME (American Society of Mechanical Engineers) Boiler & Pressure Vessel Code, Section I
ASME (American Society of Mechanical Engineers) Boiler & Pressure Vessel Code, Section VIII, Division 1
API (American Petroleum Institute) Recommended Practice 520 and API Standard 526, API Standard 2000 (low pressure - Storage tank
European standard steam boiler safety valveISO 4126 (harmonized with European Union directives)
EN 764-7 (former CEN standard, harmonized with European Union directives, replaced with EN ISO 4126-1)
AD Merkblatt (German)
PED 97/23/EC (Pressure Equipment Directive - European Union)
Pompe A Trascinamento Magnetico
, Pompe Centrifughe
, Pompe Olio
, Pompe Sommerse
, Valvole Di Ritegno