UPVC Pressure Release Valve

The UPVC Pressure Release Valve is a safety device designed to automatically release excess pressure from a piping system to protect equipment and maintain optimal operational conditions. Made from Unplasticized Polyvinyl Chloride (UPVC), it offers excellent chemical resistance and durability in corrosive environments. This valve is essential in applications where overpressure could cause damage or system failure, such as in water treatment, chemical processing, and industrial piping networks. The valve is factory-set or field-adjustable to a specific pressure threshold, ensuring system protection and consistent performance.

UPVC Pressure Release Valve Details

DN: Nominal Diameter (Internal size).
L: Total Face-to-Face Length.
H: Total Height from the bottom of the body to the top of the bonnet/handle.
D: Outer Diameter of the valve body or flange.
d / z / h: Typically refer to socket depth, port diameter, or specific bolt-hole center dimensions.

DN	L	H	D	d	z	h
15	170	172	82	20	21	27
20	170	172	82	25	21	27
25	212	202	107	32	26	35
32	226	202	107	40	28.5	35
40	292	259	148	50	37	58
50	305	259	148	63	37	58

Parameter	Specification / Typical Value	Remarks
Valve Type	Pressure Release Valve (Safety Valve)	Automatically releases excess pressure
Body Material	UPVC (Unplasticized Polyvinyl Chloride)	High corrosion and chemical resistance
Seal / Diaphragm	EPDM / FKM (Viton)	Selected based on fluid compatibility
Spring Material	Stainless Steel (Encapsulated)	Provides pressure control and durability
Pressure Range	0.5 to 10 bar (adjustable or preset)	Depends on valve design
Pressure Rating	PN10 / PN16	At 20°C (typical for UPVC valves)
Size Range	½” to 4” (15 mm to 110 mm)	Standard industrial sizes
End Connections	Socket / Threaded / Flanged	As per DIN, ASTM standards
Temperature Range	0°C to 60°C	Above this, pressure capacity reduces
Mechanism	Spring-loaded / Diaphragm type	Opens at set pressure, closes after relief
Orientation	Vertical (recommended)	Ensures proper functioning
Flow Medium	Water, chemicals, wastewater	Check compatibility before use
Standards	ASTM, DIN, ISO	Ensures quality and performance
Color	Grey / Light Grey	Standard UPVC appearance
Density	~1.35–1.40 g/cm³	Lightweight material
Corrosion Res.	Excellent	Suitable for acids, alkalis, salts
Thermal Cond.	Low (~0.16 W/m·K)	Good insulation property
Service Life	Long (low maintenance)	Non-metallic, no rusting

Overpressure Protection: Automatically relieves excess pressure to prevent system damage.
Chemical Resistance: UPVC construction resists aggressive acids, alkalis, and corrosive chemicals.
Adjustable Set Pressure: Allows precise control of pressure settings according to system needs.
Reliable Sealing: EPDM or FKM seals ensure leak-proof performance under high pressure.
Non-Corrosive Components: All wetted parts are corrosion-resistant for extended service life.
Compact Design: Space-saving construction makes it easy to install in tight piping systems.
Maintenance-Free Operation: Simple, automatic function with minimal servicing required.

Valve Size (DN)	Nominal Pressure Class	Max Working Pressure
DN15 – DN25	PN10	10 bar (145 psi)
DN15 – DN50	PN16	16 bar (232 psi)
DN50 – DN100	PN10	10 bar (145 psi)
DN80 – DN150	PN6	6 bar (87 psi)

If you are searching for customized product designs that meet your requirements, don’t worry. Petron Thermoplast also offers custom product manufacturing services to meet the unique needs of various industries. Work with our expert engineers to create custom designs suited for your application.

Benefits of Upvc Pressure Release Valve

1. Excellent Corrosion Resistance

UPVC Pressure release Valve are most resistant to acids, alkalis, salts, and corrosive fluids
These are the ideal for water treatment, wastewater systems and chemical processing
There are no rusting or scaling like metal valves

2. Lightweight Construction

UPVC Pressure release Valve are much lighter than metal pressure relief valves
These are the easier to handle, installation, and maintenance
Reducing the load on piping systems and supports

3. Cost-Effective Solution

UPVC Pressure release Valve are in lower material to manufacturing the cost compared to alloy valves
Reduce the installation and maintenance expenses
Long service life in corrosive environments

4. Good Pressure Performance (Low to Medium Pressure)

These are the suitable for low to moderate pressure applications
Available in PN6, PN10, and PN16 ratings (depending on size and manufacturer)
These pressure is reliable for release at preset limits

5. Chemical Compatibility

Wide compatibility with industrial fluids such as:
- Water
- Wastewater
- Dilute acids and alkalis
Maintains the integrity where metals may fail

6. Low Maintenance Requirements

Smooth internal surfaces minimize deposits
Related to fewer corrosion-failures
Simple spring and diaphragm mechanisms

7. Good Sealing Performance

Elastomer seals (EPDM / FKM) provide leak-tight operation
Effective pressure has release to reseating
Minimal pressure has loss during normal operation

8. Non-Conductive and Non-Magnetic

They are non-conductive electrically
UPVC Pressure release Valve are safe for use in sensitive environments
They are no galvanic corrosion issues

9. Easy Integration with UPVC Piping Systems

They are compatible with uPVC pipes, fittings and flanges.
UPVC Pressure release Valve are solvent cement or flanged connections
Uniform material behavior under pressure and temperature

10. Environmentally Durable

Good resistance to UV (with stabilizers or coatings)
Suitable for indoor and outdoor installations
Long service life in harsh environments

Types and Uses of UPVC Pressure Release Valve

1. Spring-Loaded Pressure Release Valve

A spring keeps the valve closed
It opens automatically when system pressure exceeds the set pressure
Close again once pressure drops

2. Diaphragm-Operated Pressure Release Valve

Upvc Pressure Release Valve are uses a flexible diaphragm
Pressure acts on diaphragm to open valve

3.Pilot-Operated Pressure Release Valve

Small pilot valve senses pressure
Controls opening of the main valve

4. Low-Pressure Release / Safety Valve

Opens at very low preset pressure
Used mainly for system protection rather than flow control

5. Vacuum / Pressure Combination Release Valve

Releases excess positive pressure
Also allows air intake during vacuum conditions

Why Choose Petron Thermoplast?

Petron Thermoplast is a leading manufacturer of UPVC pressure release valves committed to delivering durable and high-performance UPVC pressure release valves, so it meets global standards. Recognized among the best valves, our solutions combine advanced materials and precision manufacturing to support reliable water supply systems across commercial and industrial sectors. With a focus on innovation and quality, Petron Thermoplast provides trusted valve solutions to complex infrastructure needs.