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Sell YARWAY BLOW-OFF VALVES

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  • Company Name :Tian Yi Hong Tu Tianjin Technology Co. , Ltd.
  • Membership :Free member
  • Registrarion Date :2020. 01. 20
  • CountryRegion:China
  • Address:building B, Niupeng Zhongchuang, no. 24 Dongting Road, Hexi district Tianjin Tianjin, China
  • Phone / Fax:86-022-85190885  /  86-022-85190885
  • Contact:Tao
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Description

YARWAY BLOW-OFF VALVES
Fisher Control Valve
BLOW-OFF VALVES manufacturer
SEATLESS, HARDSEAT AND UNIT TANDEM
Designed for blow-off service in boiler systems with pressures of 3206 psig
FEATURES
• Designed according ASME section 1, ASME B31.1, ASME B16.34.
• For boiler systems up to 3206 psig.
• Rugged construction to withstand high pressure and high velocities.
• Excellent resistance to cleaning acids and wear caused by precipitated solids.
Seatless valves
• No Seat
- will not score or plug with dirt
- will not leak
• Live-loaded packing
- will not leak after packing
• Slow opening
-will not rapidly drain boiler drum
Unit tandem valves
• Combination of hardseat and seatless valves in a single body
- eliminates pipe joints
- reduces potential leaks
- fits into a confined space
Hardseat valves
• Stellite seat faces
- resists wear
provides long service life
GENERAL APPLICATION of china low noise displacement pumps
Blow-off service in boiler systems to remove dirt, sediment and scale as well as maintain boiler level surge.
Size range: NPS 1, 1¼, 1½, 2, 2½
TECHNICAL DATA
[DN 25, 32, 40, 50, 65]
Pressure Rating: Up to 3206 psi Connection: Flanged, Socketweld, Buttweld Materials: Cast Iron, Carbon Steel
GENERAL DESCRIPTION of BLOW-OFF VALVES
Basic requirements for the design and use of blow-off valves are established by the ASMEPower Boiler Code, Section l. The general form of a valve, the materials of its construction,allowable boiler pressures, and the installation of the valve are all determined by the code.
Yarway blow-off valves are designed in conformance with all code requirements (ASME Section l, ASME B31.1, ASME B16.34).
 
Because the primary purpose of a blow-off valve is removal of dirt, sediment and scale, the boiler code requires that valves whichhave dams or pockets in which sediment can accumulate cannot be used in blow-off service. This means that ordinary globe valves cannot be used as blow-off valves.

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