Design of China dual plate check valve
This valve consists of two plates hinged on a single pin. The load is carried by two plates supported at the center by a single beam the the cylindrical valve body. The curved portion of the plates are supported by a flat shoulder in the valve body. The torsion spring actuates the plates for positive closure before the reverse flow can occure in most applications. The stop pin serves as a positive stop to limit the plates from traveling more than 85 degrees.
Design Standard: API 594, API 6D, JB/T 8937.
Face to face: API594, API 6D, DIN 3202, JB/T 8937.
Connection: Lugged type
Connection standard: ANSI B 16.5, DIN 2543 C2548, API 605, ASME B 16.47.
Testing & inspection: API 598
Pressure-temperatrue: Class Standard ANSI B 16.34, DIN 2401, JB/T 74, SH 3406.
Pressure Rating: Class 150LB - 2500LB
Size: NPS 1/2" - 48"
Applicable Media: Water, steam, oil, nitric acid, acetic acid, urea, strong oxidizing agent etc.
Material: WCB, LCB, LF2, A105, 304(L), CF8(M), CF3(M), F51, Special alloy steel etc.
Design Standard |
API 594, ASME B 16.5, BS 1868, ASME B 16.34-2004 |
Face to face standard |
API 6D, API 594, DIN 3202 |
Connection standard |
ASME B 16.47B, MSS SP-44, ASME B 16.5 |
Testing Standard |
API 598 |
Connection Type |
Wafer Type |
Pressure Rating: Class |
150LB - 900LB |
Size |
NPS 1/2"-8" |
Material |
WCB, WC6, WC9, CF8, CF8M, CF3, CF3M, etc. |
part name |
Material |
Body |
Cast Iron or Ductile Iron |
Disc |
Bronze or Ductile Iron or Stainless Steel |
Pin |
SS410 or SS416 or SS304 or SS316 |
Spring |
Stainess Steel |
Insert Body |
Cast Iron/EPDM or Ductile Iron/EPDM |
Bolt |
Stainless Steel |