Safety Valve Manufacturer in India

Industrial process systems often operate close to their design pressure limits. Sudden pressure rise caused by thermal expansion, blocked outlets, fire exposure, or equipment malfunction can quickly exceed allowable overpressure limits. As a safety valve manufacturer in India, we design and supply engineered pressure relief solutions that protect pipelines, pressure vessels, boilers, and rotating equipment by relieving excess pressure before system integrity is compromised.

Unlike regulating or flow control devices, safety valves are engineered exclusively for overpressure protection. Each valve is designed to open precisely at the defined set pressure accuracy, deliver the required relieving capacity, and reseat reliably once pressure falls to safe limits. Speciality Valve Manufactures safety valve solutions developed around actual process conditions, applicable codes, and long-term operational reliability.

Safety Valves Working and Function

A safety valve is an automatic mechanical pressure-relieving device designed to open when system pressure exceeds a predetermined set pressure and to close once normal operating pressure is restored. The opening and closing behavior is governed by spring force, disc area, and back pressure conditions.

Safety valves operate independently of external power or control systems, making them a critical final layer of protection in pressure relief systems. Key functional characteristics include:

• Accurate set pressure response
• Controlled blowdown percentage
• Stable relieving flow without chatter
• Reliable reseating pressure behavior

These valves are essential for compliance with pressure equipment regulations and safe plant operation.

Typical Safety Valve Applications

• Overpressure protection of vessels and pipelines
• Boiler and pressure vessel safety
• Emergency pressure relief during upset conditions
• Thermal expansion protection in liquid-filled lines

Selecting the Right Safety Valve Type

Different operating conditions require different safety valve designs. Selection depends on pressure range, relieving capacity calculation, allowable overpressure, and back pressure effects.

Common Safety Valve Types 

Bellow Type Safety Valve
Designed with a metallic bellows to isolate spring and bonnet components from corrosive or toxic media. Bellows also compensate for variable back pressure, improving set pressure accuracy.

Conventional Spring Loaded Safety Valve
Uses a calibrated spring mechanism to open at preset pressure. Suitable for general industrial applications where back pressure remains within acceptable limits.

Pilot Operated Safety Valve
Uses a pilot valve to control opening of the main valve, allowing precise pressure control, minimal blowdown, and stable operation in high-capacity systems.

Pressure Safety Valve
Used for compressible fluids such as gases and vapors where rapid pressure relief is required.

Steam Safety Valve
Specifically designed for saturated and superheated steam service, commonly used in boiler safety valve applications.

Thermal Safety Valve
Installed in liquid-filled pipelines to relieve pressure caused by thermal expansion when isolation occurs.

Each safety valve type is selected based on relieving capacity requirements, system pressure profile, and applicable ASME or API safety valve requirements.

Materials & Construction

Material selection plays a key role in safety valve performance during relief events. Valve bodies, trim components, springs, and seating surfaces are selected based on pressure, temperature, and corrosion resistance.

Common Body Materials

• Carbon Steel: WCB, LCB, LF2
• Stainless Steel: CF8, CF8M, CF3, CF3M
• Duplex & Alloy Grades: F51, F55, Alloy 20

Trim materials are engineered to maintain sealing integrity, minimize leakage rates, and ensure repeatable set pressure performance over extended service life.

Sizes, Pressure Ratings & Compliance Standards

Safety valves are manufactured to meet a wide range of project specifications and international standards:

• Sizes: ½” to 24”
• Pressure Class: Class 150 to Class 2500
• PN Ratings: PN10 to PN420
• End Connections: Flanged, Threaded, Butt Weld
• Operation: Spring Loaded / Pilot Operated

Standards & Codes Followed

• ASME Section I – Boiler safety valves
• ASME Section VIII – Pressure vessel safety valves
• API safety valve requirements
• Applicable safety valve testing standards

Compliance with these standards ensures correct allowable overpressure limits, certified relieving capacity, and safe operation under design conditions.

Industry Applications

Safety valves are widely used across industries where pressure relief system reliability is critical:

• Oil & gas processing and refinery pressure relief systems
• Power plant and boiler safety valve installations
• Chemical and petrochemical plant safety valve design
• Storage tanks and pressure equipment protection
• Industrial utilities and process units

Operating pressure fluctuations, temperature rise, media properties, and installation conditions are considered during selection.

Quality Control & Testing

Each safety valve undergoes comprehensive inspection and testing prior to dispatch to ensure performance under real operating conditions:

• Set pressure verification and blowdown percentage testing
• Hydrostatic shell and seat leakage testing
• Relieving capacity validation
• Reseating pressure and stability checks
• Dimensional, visual, and documentation inspection

These procedures confirm consistent opening behavior and reliable resealing performance.

Safety Valve Sizing & Selection Support

Correct safety valve sizing is essential for compliance and system safety. Engineering support is provided based on:

• Process data and relieving scenarios
• Relieving capacity calculations as per code
• Set pressure determination and allowable overpressure
• Back pressure effects on safety valve performance
• Installation orientation and discharge considerations

This approach ensures valves are selected based on actual operating risk rather than catalogue assumptions.

Body and Trim Material Selection Guide

Our Value to Your Project : 

• In-house manufacturing and testing facilities
• Experience supplying safety valves across India and export markets
• Capability for standard and severe service applications
• Compliance with international pressure equipment standards
• Project-oriented technical and documentation support

The focus remains on supplying safety valves that perform reliably during actual pressure excursions, not just under test conditions.