SVF - Model SFIA Series -Superheater Safety Valve

• Design and manufacture standard: Design and manufacture standard:
• Nominal diameter: 2 1/2"(DN65)
• Nominal pressure: 4500LB
• The design, manufacturing and testing meet the requirements of ASME I, GET 12243 and ASME B16.34.

Stricture feature and adiantage:

1. Hie valve seat ii designed to the shape of de Laval nozzle, tvith the addition of adjustable double adjusting rings, at the opening of die safety valve, the reactive force produced by steam and the expansion force of steam wwtinm can be used to help the valve open at full discharge, so it has large coefficient of discharge.
2. According to actual working conditions, valve clack can be n^npiait to be special elastic vahe clack and rigid valve clack. The seal test pressure of rigid valve clack can reach 93% set pressure, and use seal test pressure of elastic valve clack can reach 96% set pressure.
3. 3. It can be realized by adjusting the valve seat adjusting ting and guide sleeve adjusting ring that the overpressure is less than 3% and Die blondonn reaches 4%-?%. In addition, the blondown can be adjusted through backpressure cavity adimtiiiH
4. The valve seat sealing surface is made of hard alloy by build-up welding with such characteristics as wear resistance, erosion resistance, and long service life.
5. Open type hornet, and the radiator provided between vahe bod}- and bonnet canprevem direct c<Mgractbeween steam and spring aidiichsije. thui redudn? th* temperature of spring.
6.  Special materials of guide sleeve, valve clack, and valve clack sear, stria requirements far geometric tolerance and finish, rigorous spring rigidity control, and die design of open-type bonnet ensure mat the vahe can release accurately each
7. Vahe clack plug for hydro test can be subjected to strength test on site.
8. Travel switch for safety vahe release and steam exhaust signal can be provided as required. 9. Each vahe product is tested for iii«i properties at delivery.