Industrial Spring-Loaded Safety Valves (SLVS) are a type of safety valve used in various industrial applications. They are typically used when there is a risk of catastrophic valve failure due to excessive pressure build-up, they are designed to open when pressure builds up inside them. This allows the valve to quickly and safely open and release any pressure that builds up inside it. The most common use for industrial SLVSs is in the oil and gas industry, where they are commonly used to prevent oil or gas from flooding into a facility if a valve fails.
In these situations, the valve will typically be mounted on a pipe that runs through the facility. When pressure builds up inside the pipe, the valve will automatically open and release any pressure building up inside it. SLVSs are also commonly used in other industrial applications, such as manufacturing plants, food processing facilities, and chemical plants.
Spring Loaded Safety Valve Specification
Size Range | : | 25 mm X 50 mm to 250 mm X 350 mm |
Pressure Rating | : | 150# To 2500# BS 10 Table-H x E |
Body M.O.C | : | Carbon Steel / Alloy Steel / Stainless Steel |
Facing | : | Raise Face (R.F), Flat Face (F.F), Ring Type Joint (RTJ) |
Trims | : | CF8 / 8M / SS 304 / 316 |
Orifice (seat) Dia. | : | 9.5 mm to 190 mm |
End Connection | : | Flange End & Butt Weld |
Standard Followed
- Sizing : API 520
- Design & Mfg. : API 526
- Testing : API 527
- Code : ASME Section VIII Div. 1 / ASME Section 1
- IBR – 1950
- ANSI B 16.34
- ANSI B 16.5
- NACE MR 0175
Material & Specification
Part Name | Material |
---|---|
Body | ASTM A216 GR. WCB/ A217 GR WC6 / WC9 / A351 GR CF8 / CF8M |
Open Bonnet | ASTM A216 GR. WCB / S.G.IRON / A217 GR WC6 / WC9 / A351 GR CF8 / CF8M |
Open Cap | ASTM A216 GR. WCB / S.G.IRON/SS |
Nozzle | ASTM A351 GR. CF8 / CF8M |
Disc | SS 304 / SS 316 |
Nozzle Ring | ASTM A351 GR. CF8 / CF8M |
Guide | ASTM A351 GR. CF8 / CF8M |
Stem | SS 410 |
Lock Screw | SS 304 |
Disc Holder | ASTM A351 GR. CF8 / CF8M |
Adjusting Screw | SS 410 |
Spring Washer | Mild Steel |
Adj. Screw Nut | SS 304 / SS 410 |
Setting Spring | Carbon Steel / Alloy Steel / SS 302 / Inconel |
Gasket | Aramid Fiber (Non-Asbestos) |
Fork & Lever | ASTM A216 GR. WCB / S.G. IRON/ SS |
Stem Nut | Mild Steel |
Studs & Nuts | A193 GR. B7 / A 194 2H |
Thrust Bearing | Hardcrome Iron |
Salient Features
- High Discharge Capacity
- Accurate Setting for Correct Blow off Pressure
- “Repeatability” of Spring for Set / Reset Pressure with High Accuracy
- Mirror Polished Finish Metal to Metal Seat
- Precision Lapped Valves Disc & Seat (Nozzle)
- Stellited Trims (Optional)
- Set / Reset Pressure Accuracy as per ASME / IBR code
- Each Valve Individually Tested with Compressed Air