Description
TECHNICAL DATA SHEET
1″ 150LB FLANGED LIFT CHECK VALVE
| Category |
Specification |
| Valve Type |
Bolted Bonnet Lift Check Valve (Non-Slam Design) |
| Size |
1″ NPS |
| Pressure Class |
ASME 150 LB (PN 20) |
| Design Code |
API 594 / ASME B16.34 |
| Face-to-Face |
ASME B16.10 |
| End Connection |
Raised Face (RF) Flange, ASME B16.5 Class 150 |
| Flow Direction |
Vertical Installation Required (Flow Up ↑, Arrow Marked on Body) |
| Operation |
Automatic (Spring-Assisted Closing) |
| Test Standard |
API 598 / MSS SP-61 |
| Temp Range |
Standard: -29°C to +425°C (-20°F to +800°F) |
| Leakage Class |
Class IV (Metal Seat, per API 598) |
MATERIAL SPECIFICATION (ASTM)
| Component |
Material |
| Body & Bonnet |
Carbon Steel, ASTM A105N (Normalized Forging) |
| Disc (Piston) |
ASTM A105N + Stainless Steel Seat Face |
| Seat Ring |
Stainless Steel, ASTM A182 F304L / F316L |
| Disc Guide |
Stainless Steel, ASTM A276 Type 304/316 |
| Spring |
Stainless Steel, ASTM A313 Type 316 or 17-7PH |
| Bonnet Gasket |
Spiral Wound: SS316 Filler + Flexible Graphite, SS316 Inner/Outer Rings |
| Bolting |
ASTM A193 B7 Studs + ASTM A194 2H Nuts |
| Hinge Pin |
ASTM A276 Type 416 / 17-4PH (Hardened) |
DESIGN & TESTING
| Feature |
Detail |
| Sealing |
Metal-to-Metal (Stainless Steel Disc Face → Stainless Steel Seat) |
| Anti-Slam Mechanism |
Spring-Assisted Rapid Closing |
| Cracking Pressure |
Low (Adjustable via Spring Rate; Specify if Critical) |
| Shell Test Pressure |
225 PSIG (1.5 × 150LB Rating) |
| Seat Test Pressure |
165 PSIG (1.1 × 150LB Rating, Backflow Direction) |
| Backseat Test |
Included (per API 598) |
MARKING & FINISH
| Item |
Specification |
| Marking Standard |
MSS SP-25 / ASME B16.34 |
| Required Markings |
Manufacturer, Size (1″), Pressure Class (150), Material (A105N),
Heat No., Serial No., FLOW DIRECTION ARROW |
| Surface Prep |
Blast Cleaned to Sa 2½ (ISO 8501-1) |
| Coating |
Epoxy Primer + Epoxy Paint (RAL 7012 Grey Standard) |
| End Protection |
Plastic Caps (ASME B16.5 Class 150) |
