UPVC Spring Check Valve

A UPVC Spring Check Valve is a specific type of check valve that uses a spring mechanism to regulate the flow of water or fluids in one direction while preventing backflow. The design of UPVC spring check valves varies, but the underlying principle remains the same: to allow water to flow in one direction and block it in the opposite direction. This function is called critical in the prevention of damage, contamination, and inefficiencies in pipelines, pumps, or other equipment.

A UPVC spring check valve operates on a simple but effective principle. When fluid flows in the intended direction. This movement opens the valve, allowing the water to pass through. Whether it is a water treatment facility, oil and gas pipelines, chemical plants, or HVAC systems, these UPVc spring check valves act as silent sentinels, safeguarding processes and equipment from adverse conditions.

UPVC Spring Check Valve Details

d → Nominal Size (in inches)
DN → Diamètre Nominal (Nominal Diameter, in mm)
PN → Pressure Nominal (Pressure Rating, in bar)
E → End-to-End Length
H → Overall Height
L → Connection / Socket Length
Z → Center to End Distance
g → Weight (in grams)

d	DN	PN	E	H	L	Z	g
1/2″	15	16	54	96	22,5	51	149
3/4″	20	16	63	105	25,5	54	188
1″	25	16	72	117	28,7	59,5	292
1″ 1/2	40	16	100	147	35	77	640
1″ 1/4	32	16	85	136	32	72	445
2″	50	16	118	174	38,2	97,6	1010
2″ 1/2	65	16	157	211	44,5	122	2480
3″	80	16	174	248	48	152	3090
4″	100	16	212	283	57,5	168	5370

Parameter	Specification / Typical Value	Remarks
Valve Type	Spring Check Valve (Non-Return Valve)	Prevents backflow automatically
Design Type	Spring-loaded axial / inline type	Quick closing mechanism
Body Material	UPVC (Unplasticized Polyvinyl Chloride)	High corrosion and chemical resistance
Disc / Cone Material	UPVC / ABS / PP	Lightweight and durable
Spring Material	Stainless Steel (SS 302 / SS)	Ensures automatic closure
Seal Material	EPDM / FKM (Viton)	Leak-proof sealing, chemical resistant
Working Pressure	Up to 10–16 bar (PN10 / PN16)	Depends on size and model
Cracking Pressure	Low (approx. 0.03–0.05 bar)	Opens with minimal flow pressure
Temperature Range	0°C to 60°C	Suitable for standard UPVC applications
Size Range	½” to 4” (DN15 to DN100)	Available in metric and imperial sizes
End Connections	Socket, Threaded (BSP/NPT), Flanged	Multiple installation options
Flow Direction	Unidirectional	Marked on valve body
Installation	Vertical or Horizontal	Flexible installation
Operation	Automatic (spring-loaded)	No manual control required
Standards	ASTM, DIN, ISO	Ensures quality and compatibility
Color	Grey / Light Grey	Standard UPVC finish
Corrosion Res.	Excellent	Resistant to acids, alkalis, salts
Weight	Lightweight	Easy handling and installation
Applications	Water treatment, irrigation, chemical lines	Widely used in industrial systems

Spring-Loaded Design – Ensures quick closure to prevent reverse flow and water hammer.
High Corrosion Resistance – UPVC body and components resist acids, alkalis, and saline water.
Non-Metallic Construction – Ideal for chemical and non-metallic piping systems.
Low Cracking Pressure – Opens easily with minimal upstream pressure.
Compact & Lightweight – Easy to install and handle, especially in overhead or space-limited areas.
Vertical or Horizontal Mounting – Versatile installation for multiple system layouts.
Maintenance-Friendly – Simple access to internal components for inspection or replacement.

Valve Size (DN)	Nominal Pressure Class	Max Working Pressure
DN15 – DN25	PN16	16 bar (232 psi)
DN32 – DN50	PN16	16 bar (232 psi)
DN65 – DN80	PN10	10 bar (145 psi)
DN100	PN10	10 bar (145 psi)
DN125 – DN150	PN6	6 bar (87 psi)

Operating Temperature	Pressure Derating Factor	Allowable Pressure (%)
20 °C	1.00	100%
30 °C	0.85	85%
40 °C	0.70	70%
50 °C	0.55	55%
60 °C (max)	0.40	40%

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 Spring Check Valve

Unidirectional Flow

Upvc Spring check valve to ensure the water fluid travels only in the intended direction, and prevents damage to the system due to backflow.

Enhanced Safety

The prevention of Upvc Spring check valve to reverse the flow of risks to reduce contamination and mechanical failures.

Efficiency

These quick and reliable actions of the spring mechanism minimize downtime and maintenance according to needs.

Energy Savings

By controlling the water fluid flow accurately, these upvc spring check valves contribute to energy-efficient operations.

Cost-effectiveness

Durable design and lower maintenance requirements to reduce long-term costs.

Types and Uses of UPVC Spring Check Valve

1. Threaded UPVC Spring Check Valve

UPVC Spring Check Valves are Female or male to connect the threaded ends.
Usually the size range is 1/2″ to 4″ (varies by manufacturer).
UPVC Spring Check Valves are easy to install in small pipelines, light industrial, and domestic applications.
Compact design to ensure the valve closes automatically when flow stops.

2. Socket Weld (Solvent Weld) Spring Check Valve

UPVC Spring Check Valves are solvent-welded (glued) to UPVC pipes.
These sizes range from 1/2″ to 6″ (typical).
Used in permanent pipeline systems where threaded connections are not preferred.
Strong, leak-proof joints with chemical resistance are ideal for corrosive liquids

3. Flanged Spring Check Valve

These connection types are flanged ends (bolted to pipeline flanges)
Size range: Usually 2″ and above
Industrial applications with larger pipelines, and easy maintenance due to flange removal
High durability, easier replacement, and suitable for higher flow rates

4. Mini Spring Check Valve

Small diameter, threaded or socket type
Size range is 1/4″ to 1/2″.
Laboratory setups, small pumps, aquariums, and RO systems.
Compact and lightweight, and prevents backflow in small systems.

5. Silent or Low-Noise Spring Check Valve

These connection types are threaded or flanged.
Used where water hammer or noise due to fast closing is a concern.
Special spring and seat design to close slowly, reducing water hammer.

Why Choose Petron Thermoplast?

Petron Thermoplast is a choice of a UPVC spring check valve over other types of valves that can be attributed to various factors. One of the primary considerations is the enhanced control that a spring provides, which translates to more reliable operation under fluctuating conditions.