Safety Valve
water heater relief valve
water heater relief valve
Vacuum safety valve
Safety Valve

Stainless Steel water heater Vacuum Thermal relief Safety Valve

JN-SFTV23-1001-14
Size: DN25–DN150;
Grade: SS304/SS316L;
Standard: DIN/SMS/ISO/3A;
Working pressure: 0.1–10 bar adjustable;
Test pressure: 1.5× rated;
Temperature Range: -20°C to 180°C;
PTFE seals: chemical-resistant and hygienic;
Viton seals: high-temperature durable. Designed for automatic pressure and vacuum protection in sanitary tanks and process systems.
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Stainless Steel water heater Vacuum Thermal relief Safety Valve

Stainless Steel Water Heater Vacuum Thermal relief Safety Valve is a dual-function protective valve designed to manage vacuum conditions and pressure increases caused by thermal expansion in water heating systems. It is usually installed on the upper safety outlet or hot water outlet pipeline of water heaters and storage tanks, where temperature changes may create pressure buildup or negative pressure during cooling. At this location, the valve automatically releases excess thermal pressure or admits air to eliminate vacuum,protecting the heater tank and pipelines from deformation or failure. Common types include spring-loaded thermal release valves, vacuum relief safety valves, temperature-pressure combination valves, and adjustable thermal vacuum safety valvesused in heating and hot-water systems.

Stainless Steel Water Heater Vacuum Thermal relief Safety Valve differs from ordinary safety valves because it is designed to handle both vacuum conditions and thermal pressure changesin water heater systems. Conventional safety valves typically release pressure only when it exceeds a set limit, while this valve automatically balances internal pressure by releasing thermal expansion pressure and allowing air intake during vacuum conditions. Compared with similar products from other manufacturers, our valve featureshigh-quality stainless steel materials, precision spring calibration, and optimized sealing structure, ensuring corrosion resistance and reliable performance. In addition, our design providesstable pressure response, improved safety protection, and longer service life,making it ideal for modern heating and hot-water pipeline systems.

 

Accessories

 Component & Material Table
  • Valve Body – SS316 / SS316L stainless steel; cryogenic-grade pressure-bearing casting or forged body
  • Valve Disc / Poppet – SS316L stainless steel; precision-machined sealing surface
  • Valve Seat – Stainless steel or soft seat (PTFE / PCTFE for cryogenic use)
  • Spring Assembly – Low-temperature alloy spring steel; stable pressure response
  • Bonnet / Cover – SS316 stainless steel; sealed and insulated design
  • Stem & Guide Sleeve – SS316 stainless steel; anti-freezing clearance design
  • Sealing Elements – PTFE / PCTFE / Metal seal (for ultra-low temperature)
  • Exhaust Port – Threaded or flanged stainless steel discharge outlet
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 water heater Vacuum Thermal Release Safety 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 water heater Vacuum Thermal Release Safety 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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