Stainless Steel Safety Valve: 2026 Price & Selection Guide
Stainless steel safety valves are essential for corrosive media, food processing, pharmaceutical, and chemical applications. Compared to carbon steel, SS304 and SS316L offer excellent resistance to acids, alkalis, and chloride attack. Below are price ranges and key selection parameters for common sizes.The main safety valve product names of China Safety Valve Network include:,Impulse Spring Safety Valve,JIS Safety Valve,Main Safety Valve,Overflow ValveOil Refining Specific Safety Valve,Pulse Safety Valve,Pilot Safety Valve,Pressure Safety Valve,Quick Switching Safety Valve,Spring Low Lift Safety Valve,Spring Low Lift High Pressure Safety Valve,Spring Low Lift Closed High Pressure Safety Valve
2026 Price Reference (USD, ex-works)
|
Material |
Size |
Connection |
Set Pressure Range |
Unit Price (USD) |
|
SS304 |
DN15 |
Threaded (Rc) |
0.3–1.6 MPa |
$25–39 |
|
SS304 |
DN25 |
Flanged |
0.3–2.5 MPa |
$62–94 |
|
SS316L |
DN20 |
Threaded |
0.5–4.0 MPa |
$44–66 |
|
SS316L |
DN40 |
Flanged |
1.0–6.4 MPa |
$152–220 |
|
SS316L full‑lift |
DN50 |
Flanged (gas/steam) |
0.3–1.6 MPa |
$250–360 |
Price drivers:
SS316L costs 30–50% more than SS304.
Stellite hardfacing adds 20%.
ATEX or class society certification adds 25–40%.
Non‑standard set pressures add about 20%.
Key Selection Parameters
Set pressure & backpressure – Set pressure is the opening pressure. For conventional spring valves, backpressure must not exceed 10% of set pressure. Use a balanced‑bellows valve for higher backpressure.
Lift type – Conventional‑lift (≤0.05d₀) for liquids. Full‑lift (≥0.25d₀) for gases and steam.
Material selection – Body/bonnet: SS304 for mild corrosion, SS316L for chlorides, seawater, strong acids. Spring: stainless steel or heat‑resistant alloy. Seat: Stellite hardfacing or PTFE.
Connection standards – Threaded (G, Rc, NPT) or flanged (GB/T 9113, HG/T 20592, DIN, ANSI B16.5).
Media & temperature – Gas/steam: full‑lift. Liquid: conventional‑lift. Above 200°C: choose a valve with cooling fins or a bellows to protect the spring.
Installation & Maintenance Tips
Hydrostatic test pressure = 1.5 × set pressure.
Inlet piping: as short as possible, total pressure loss ≤3% of set pressure.
Discharge: never toward personnel or ignition sources. Toxic media require closed discharge.
Calibrate at least once a year; shorten interval for corrosive services.
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