safety relief valve
Safety Valve
Safety Valve
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safety relief valve

Stainless Steel Leser Cryogenic Pressure Safety Relief Valve

JN-SFTV23-1003-5
Size: DN15–DN100.
Grade: SS304/SS316.
Standard: DIN, ANSI, ISO.
Working pressure: up to 40 bar.
Test pressure: 1.5× rated pressure.
Temperature Range: -20°C to 200°C.
PTFE seals: high chemical resistance.
Viton seals: excellent oil and heat resistance for hydraulic systems.
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Stainless Steel Leser Cryogenic Pressure Safety Relief Valve

Stainless Steel Leser Cryogenic Pressure Safety Relief Valve is a specialized cryogenic Valve leser valve overpressure protection valve designed for cryogenic liquid and ultra-low temperature gas systems.It is typically installed on the top of cryogenic storage tanks, LNG transfer pipelines, liquid nitrogen or oxygen supply lines, and vapor return sections, where pressure fluctuations are most critical. In this position, it serves to automatically discharge excess pressure caused by liquid expansion or rapid vaporization, preventing tank rupture and ensuring system stability under extreme low-temperature conditions.Types include spring-loaded cryogenic type, pilot-operated type, full-lift type, and balanced bellows type, all engineered for reliable sealing and performance in sub-zero industrial environments.

Compared with ordinary safety valves,Stainless Steel Leser Cryogenic Pressure Safety Relief Valve is specifically engineered for ultra-low temperature applications, featuringextended bonnet structure, cryogenic-grade stainless steel materials, and special sealing components that prevent freezing and leakage at extremely low temperatures. Standard safety valves are typically designed for ambient or high-temperature steam and gas systems, and may fail under cryogenic contraction conditions. Compared with other manufacturers, our products offerprecision low-temperature calibration, enhanced seat tightness, superior anti-cold brittleness performance, and strict helium leakage testing, ensuring stable operation, higher safety reliability, and longer service life in LNG, liquid nitrogen, and oxygen systems.

 

Accessories

 Component & Material Table
  • Valve Body: Stainless steel 304 / 316 / 316L (for corrosion resistance)
  • Bonnet/Cap: Stainless steel 304 / 316
  • Valve Disc / Poppet: SS316 or hardened stainless steel
  • Spring: Stainless steel 304 / 17-7PH alloy steel
  • Seat: SS316 with precision-machined sealing surface
  • Sealing Elements: PTFE / Viton (FKM) / EPDM
  • Adjustment Screw: Stainless steel with anti-loosening lock nut
Product Parameter Details
  • Material：Body and internal components in SS304 / SS316L; spring in stainless steel; seals in PTFE, EPDM, or Viton; all materials suitable for hygienic processes.
  • Structural Form：Spring-loaded pressure relief with integrated vacuum breaker; optional combined pressure/vacuum structure; dead-leg-free sanitary design; optional insulated or jacketed body.
  • Pressure Rating：Low to medium pressure range (e.g., 0.1–10 bar adjustable); vacuum protection sensitivity calibrated per tank requirement; factory pressure tested.
  • Function：Automatic overpressure release and vacuum compensation; surge protection; tank deformation prevention; sterile process safety assurance.
  • Grade Level：Sanitary grade for food, beverage, dairy, and pharmaceutical; optional industrial chemical grade.
  • Specification Standards：DIN, SMS, ISO, 3A, ASME BPE clamp or flange standards for global hygienic pipeline compatibility.
  • Certification / Registration：Optional FDA-compliant seals, 3A certification, material traceability, pressure testing and safety compliance documentation.
  • Installation Direction：Typically installed vertically on tank tops; horizontal installation optional depending on design; drainage-friendly configuration.
  • Customization：Adjustable pressure settings, customized sizes, special seal materials, connection types, and sample-based OEM production available.
Stainless Steel Leser Cryogenic Pressure Safety Relief Valve
 
Feature (F)、Advantage (A)、Benefit (B)
  • Raw Material:
  • F:Premium 304/316L stainless steel hygienic valve body; precision-balanced pressure disc; FDA-approved EPDM/PTFE/FKM sealing components
  • A:Outstanding corrosion and oxidation resistance; hygienic-grade material purity; stable performance under pressure fluctuation
  • B: Ideal for food, beverage, dairy & pharmaceutical tank systems; protects product integrity and prevents secondary contamination
  • Processing Technology:
  • F:Internal electrolytic polishing (Ra ≤ 0.6 μm); CNC-machined valve seat; fully enclosed spring chamber; crevice-free sanitary design
  • A: Smooth surface reduces residue buildup; accurate pressure response; enhanced structural durability; compatible with CIP/SIP cleaning
  • B: Minimizes cleaning downtime; improves production efficiency; ensures long-term stable protection of storage vessels
  • Structure Feature:
  • F: Dual-function design integrating positive pressure relief & vacuum breaker; spring-loaded overpressure mechanism; gravity-assisted vacuum plate; clamp or welded connection optional
  • A: Automatic response to sudden pressure surge or vacuum formation; precise resealing after discharge; compact hygienic configuration
  • B: Prevents tank rupture or collapse; stabilizes internal vessel pressure; supports safe continuous process operation
  • Core Accessory Feature:
  • F: Calibrated stainless steel compression spring; precision-guided pressure stem; reinforced seat alignment structure
  • A:Accurate set-pressure control; fast opening under surge conditions; consistent resealing without leakage
  • B:Enhances safety reliability; reduces pressure fluctuation risk; extends equipment lifespan and lowers maintenance frequency
  • Seal Ring Feature:
  • F:High-elastic sanitary-grade sealing ring with steam-resistant formulation; anti-aging & wear-resistant structure
  • A: Excellent airtight performance; stable elasticity after repeated sterilization cycles; wide temperature adaptability
  • B:Suitable for -20℃~150℃ working environments; prevents gas or vapor leakage; maintains safety compliance in hygienic processing systems
 
Stainless Steel Leser Cryogenic Pressure Safety Relief Valve
 
Connection Type: Sanitary clamp, flange (DIN / ANSI / SMS / ISO), threaded, or welded connections for tank and pipeline installation.
Manufacturing Process: CNC precision machining, sanitary welding, laser cutting, precision turning, and forming processes to ensure dimensional accuracy and smooth sealing surfaces.
Surface Treatment: Mechanical polishing, mirror polishing (Ra≤0.8μm or Ra≤0.4μm optional), electrolytic polishing, passivation, or matte industrial finish.
Raw Material Processing: Forged stainless steel body, precision casting components, rolled plate forming, or solid bar machining depending on pressure requirements.
Operation Method: Automatic spring-loaded operation standard; optional pneumatic-assisted or manual test lifting mechanism available.
Seal Material Options: PTFE, EPDM, Viton (FKM), Silicone, and FDA-compliant hygienic sealing materials.
Sealing Structure: Center soft sealing design standard; optional metal hard sealing or dual-seal structure for enhanced pressure and vacuum protection performance.
 
 
 
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