Control systems Safety valves
4
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TI-P276-01 CTLS Issue 1
SV66H Safety Valve
Description SV66H Safety Valves are high-capacity full nozzle valves with standard F to Q orifices. The SV66H has a modern design with two adjustment rings, allowing precise adjustment of the blowdown differential. Designed for application in boilers and organic fluid vaporisers (ASME Section I). Available types SV66H Safety Valves have flanged connections in accordance with ASME B16.5 and can be supplied with a closed bonnet. The materials of construction are selected to meet the temperature and pressure characteristics of the process fluid. Applications SV66H Safety Valves are designed for effective overpressure protection in boilers and vaporisers, including service conditions such as high pressures and high temperatures. Consult Spirax Sarco to confirm compatibility of construction materials / service conditions. Standards and construction The SV66H are designed in accordance with ASME Boiler and Pressure Vessel Code, Section I. Capacities are certified by the National Board of Boiler and Pressure Vessel Inspectors. For steam service, the valve can be stamped with 'V' and 'NB' marks. The construction materials meet the requirements of ASME Code Section I PG-73.3 and the sealing tests (watertightness) are carried out in accordance with the requirements of item PG-73.5.3 of this code. Certificates A certificate of conformity is supplied with each valve including valve set pressure and hydrostatic test. Material certification is provided in accordance with BS-EN 10204 3.1 for all primary pressure containing parts. Options Hardened seat - Stellite 6
SXS
4.7 61
SPIRAX SARCO
SXS
Page(s)
Operating pressure/temperature limits
2
Materials
2 and 3
Closed bonnet Cooling spacer
Dimensions and weights
4 to 6
Pressure/temperature limits
7 and 8
Installation and maintenance Consult the latest revision of the Installation and Maintenance Manual IM-P276-03.
Capacity tables 9 to 12 Run Factor (Ks) for Superheated Water Vapour 13 and 14
TI-P276-01 CTLS Issue 1
Page 1 of 15
SV66H Safety Valve
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