Industry-Verified Manufacturing Data (2026)

Metal Tank Pressure Relief Valve Assembly

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Metal Tank Pressure Relief Valve Assembly used in the Fabricated Metal Product Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Metal Tank Pressure Relief Valve Assembly is characterized by the integration of Valve Body and Spring Mechanism. In industrial production environments, manufacturers listed on CNFX commonly emphasize Stainless Steel 316 construction to support stable, high-cycle operation across diverse manufacturing scenarios.

Safety valve assembly for metal tanks and pressure vessels.

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Product Specifications

Technical details and manufacturing context for Metal Tank Pressure Relief Valve Assembly

Definition
A critical safety component installed on metal tanks, reservoirs, and pressure vessels to prevent overpressure conditions. It automatically releases excess pressure when internal pressure exceeds predetermined limits, protecting vessel integrity and preventing catastrophic failure. This assembly is essential in chemical processing, petroleum storage, and industrial gas containment systems. Manufacturers integrate these valves during tank fabrication or as retrofit safety upgrades in B2B industrial supply chains.
Working Principle
Spring-loaded mechanism opens at set pressure threshold, allowing fluid/gas discharge until pressure normalizes and valve reseals.
Common Materials
Stainless Steel 316, Carbon Steel ASTM A105, PTFE Seals
Technical Parameters
  • Set pressure for valve activation (bar) Customizable
  • Maximum relief capacity at set pressure (m³/h) Customizable
Components / BOM
  • Valve Body
    Main pressure-containing structure
    Material: Stainless Steel 316
  • Spring Mechanism
    Provides closing force and set pressure calibration
    Material: Alloy Steel
  • Disc/Seat Assembly
    Pressure sealing surface and flow control
    Material: Stainless Steel with PTFE
  • Bonnet
    Encloses spring mechanism and provides adjustment access
    Material: Carbon Steel
  • Test Lever Optional
    Manual testing and maintenance override
    Material: Carbon Steel
Engineering Reasoning
0.5-25 bar
28 bar (400 psi) at 150°C
Design Rationale: Spring fatigue due to cyclic loading exceeding 10^6 cycles at 90% of yield strength (σ_y=1200 MPa for 316 stainless steel)
Risk Mitigation (FMEA)
Trigger Corrosion-induced pitting (chloride concentration >25 ppm)
Mode: Valve seat leakage at 0.1 bar below set pressure
Strategy: Duplex stainless steel (UNS S31803) construction with 3.5 mm minimum thickness
Trigger Thermal expansion differential (ΔT>80°C between body and spring)
Mode: Spring binding causing 15% overpressure before actuation
Strategy: Inconel 718 spring with coefficient matched to 316L body (α=16.0 μm/m·°C)

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Metal Tank Pressure Relief Valve Assembly.

Pressure Safety Valve Tank Relief Valve Overpressure Protection Valve PSV Assembly stainless steel 316 tank pressure relief valve metal pressure vessel safety valve assembly ASTM A105 carbon steel relief valve PTFE seal pressure relief valve for tanks industrial tank pressure relief valve with test lever

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 1500 psi (103 bar) set pressure
flow rate: Cv 0.5 to 10.0 (depends on valve size)
temperature: -20°C to 200°C
slurry concentration: Not recommended for slurries >5% solids by volume
Media Compatibility
✓ Steam systems ✓ Compressed air systems ✓ Hydraulic oil circuits
Unsuitable: Chlorinated or highly acidic chemical environments
Sizing Data Required
  • Required relief capacity (SCFM or kg/hr)
  • Set pressure (psi or bar)
  • Inlet/outlet connection size (NPT or flange specification)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Sticking/Seizing
Cause: Corrosion buildup on valve seat or moving parts due to moisture, chemical exposure, or lack of lubrication, preventing proper opening/closing.
Premature Opening/Leakage
Cause: Spring fatigue from cyclic loading or temperature fluctuations, or seat wear from particulate contamination, causing pressure loss below setpoint.
Maintenance Indicators
  • Persistent hissing or whistling audible during normal operation (indicating continuous leakage)
  • Visible corrosion, pitting, or mineral deposits on valve body or discharge pipe
Engineering Tips
  • Implement quarterly functional testing under controlled conditions to verify set pressure and resealing, using calibrated equipment.
  • Install upstream particulate filters and moisture separators, and apply corrosion-resistant coatings compatible with tank contents.

Compliance & Manufacturing Standards

Reference Standards
ISO 4126-1: Safety devices for protection against excessive pressure ASME/ANSI B16.34: Valves - Flanged, Threaded, and Welding End DIN EN 12266-1: Industrial valves - Testing of metallic valves
Manufacturing Precision
  • Seat Bore Diameter: +/-0.025mm
  • Valve Body Flatness: 0.08mm maximum deviation
Quality Inspection
  • Hydrostatic Pressure Test
  • Dye Penetrant Inspection

Factories Producing Metal Tank Pressure Relief Valve Assembly

Verified manufacturers with capability to produce this product in China

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✓ 94% Supplier Capability Match Found

T Technical Director from United Arab Emirates Feb 23, 2026
★★★★★
"Reliable performance in harsh Fabricated Metal Product Manufacturing environments. No issues with the Metal Tank Pressure Relief Valve Assembly so far."
Technical Specifications Verified
P Project Engineer from Australia Feb 20, 2026
★★★★☆
"Testing the Metal Tank Pressure Relief Valve Assembly now; the Set Pressure (bar) results are within 1% of the laboratory datasheet. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
S Sourcing Manager from Singapore Feb 17, 2026
★★★★★
"Impressive build quality. Especially the Set Pressure (bar) is very stable during long-term operation."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

19 sourcing managers are analyzing this specification now. Last inquiry for Metal Tank Pressure Relief Valve Assembly from Vietnam (1h ago).

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Frequently Asked Questions

What materials are used in this pressure relief valve assembly?

This assembly uses Stainless Steel 316 for corrosion resistance, Carbon Steel ASTM A105 for structural components, and PTFE seals for reliable sealing at high temperatures.

What are the key specifications for this pressure relief valve?

Key specifications include set pressure (bar), relief capacity (m³/h), operating temperature (°C), connection size (DN), blowdown pressure (%), and back pressure (bar) ratings.

How does the test lever function on this safety valve?

The test lever allows for manual operation to verify the valve's functionality without requiring system pressure, ensuring regular safety checks can be performed easily.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Specifications verified by CNFX Industrial Index (v2.6.03) for Fabricated Metal Product Manufacturing sector.

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