Stainless Steel Flanged Ball Valve
Specifications
- Material: CF8, CF8M, WCB
- Size: DN15-DN200
- Design Standard: API608/6D, DIN3357-2 EN12516-1 ASME B16.34
- Pressure: PN16/25/40
- Flange Stanndard: ASME B16.5, EN1092-1, JIS B2220
- Planes Distance: ASME B16.10, EN558-1, JISB2002
- Test Stanndard: API598, EN12266-1, JIS B2003
Feature
- Blow-out proof stem
- Fire-safe, Anti-static
- Seats with resilient seal
Cast steel float ball valve structure characteristics
Fire-proof structure design
The valve body and the valve cover are sealed with o-ring and gasket seals. When the fire occurs, the o-ring burns out and the graphite wound gasket is kept sealed. The valve stem is sealed in o-ring + graphite packing. When the fire occurs, the o-ring burns out and the graphite packing is sealed to ensure that the shell is not leaking.
In case of fire, all nonmetallic seals are burnt out, seat support ring in contact with ball, realizes the seat and ball metal to metal seal, seat back and body seal is O ring + packing seal, When a fire occurs, the O-ring burns out and fails, but the braided graphite remains sealed, effectively ensuring that the medium will not leak in large quantities.
Fire-proof structure design
Flanged ball valve Seat Material
Seat Material | Seat Material | Tmax | |
PTFE | High corrosion resistance, good self – lubrication and wear resistance, easy to cold flow. | 160℃ | |
RPTFE | PTFE+15%GF | Resistance to creep, low coefficient of friction, resistance to chemical corrosion, good insulation. | 180℃ |
PTFE+15%CF | High strength, high temperature resistance, wear resistance, small coefficient of thermal expansion. | 180℃ | |
TFM1600 | Under high temperature and high pressure, shape denaturation is smaller, permeability is smaller, pressure recovery is better under high temperature, corrosion resistance is high. | 180℃ | |
TFM4215 | Smaller deformation and permeability under high temperature and high pressure, better stress recovery under high temperature, excellent heat resistance and chemical resistance, low friction coefficient. | 180℃ | |
PPL | High temperature resistance, high strength, radiation resistance, chemical corrosion resistance, good self-lubrication performance. | 220℃ | |
PEEK | High temperature, high pressure, high strength, chemical resistance to PTFE. | 260℃ |