CPVC Compact Diaphragm Valve

A CPVC Compact Diaphragm Valve is a type of flow-control valve made from Chlorinated Polyvinyl Chloride (CPVC) that uses a flexible diaphragm to regulate, start, or stop the flow of liquids in a piping system. The valve has a compact design, making it suitable for installations where space is limited while still providing reliable sealing and precise flow control. A CPVC Compact Diaphragm Valve is a space-saving plastic valve that controls liquid flow using a flexible diaphragm and is designed for corrosion-resistant piping systems.

The valve works by moving a flexible diaphragm up or down using a handwheel or actuator. When the diaphragm presses against the valve seat, the flow stops; when it lifts away, the fluid flows through the valve. CPVC Compact Diaphragm Valves are widely used in chemical processing, water treatment, and industrial piping systems because CPVC offers excellent resistance to corrosion, chemicals, and high temperatures. The CPVC Compact Diaphragm Valve, which consists of a flexible disc that is sealed with a seat at the top of the valve body. It is excellent for use in restricted spaces.

CPVC Compact Diaphragm Valve Details

d: Outside diameter
DN: Nominal diameter
R1: Thread size (inches)
PN: Nominal pressure (bar)
E: Body diameter
H: Overall height
H1: Center-to-bottom height
Z: Face-to-face length
I: Mounting hole distance
J: Mounting bolt thread (Metric)
FPM/PTFE: Material types (Fluorinated Rubber / Teflon)

Diaphragm Type	d	DN	R1	PN	E	H	H1	Z	I	J
EPDM	20	15	1″	6	41	129.5	58.5	97.5	35	M5
FPM	20	15	1″	6	41	129.5	58.5	97.5	35	M5
PTFE	20	15	1″	6	41	129.5	58.5	97.5	35	M5

Parameter	Details
Valve Type	Compact Diaphragm Valve (Weir / Straight-through)
Construction	Single-piece compact body with diaphragm sealing
Size Range	DN 12 – DN 15 (≈ ½”)
Pressure Rating	PN 6 (≈ 6 bar) at 20°C
Max Pressure (General)	Up to 90–150 psi (Design dependent)
Temperature Range	0°C to 60°C (Standard CPVC)
End Connections	Socket (Solvent weld), Threaded, Flanged, True Union
Standards	EN ISO 1452, ASTM D1785, DIN, JIS
Operation	Manual (Handwheel) / Pneumatic Actuator
Flow Control	Suitable for Throttling and On-off service
Body Material	CPVC (Chlorinated Polyvinyl Chloride)
Bonnet / Cover	CPVC / Glass-filled Polyamide
Diaphragm	EPDM / FKM (Viton) / PTFE
Stem / Compressor	Stainless Steel / Engineering Plastic
Seals & O-rings	EPDM, PTFE, or FKM
Design Type	Compact, lightweight, space-saving
Structure	Weir-type diaphragm (prevents fluid entrapment)
Surface Finish	Smooth internal surface for low contamination
Weight	Lightweight compared to metal valves
Leakage	Bubble-tight sealing
Flow Characteristics	Linear throttling control
Maintenance	Low maintenance, easy diaphragm replacement

Corrosion Resistance
Made from CPVC material, the valve offers excellent resistance to corrosion, chemicals, and aggressive fluids.
Compact Design
The compact body design saves installation space and makes it suitable for tight piping systems.
Excellent Chemical Compatibility
Suitable for handling acids, alkalis, and other chemical solutions commonly used in industrial processes.
Leak-Proof Sealing
The flexible diaphragm provides a tight shut-off and prevents leakage in the system.
Smooth Flow Control
Provides precise flow regulation and throttling capability.
Low Maintenance
Simple construction with fewer moving parts reduces maintenance requirements.
Lightweight Construction
CPVC material makes the valve lightweight and easy to install and handle.
High Temperature Resistance
Capable of handling higher temperatures compared to standard PVC valves.
Long Service Life
Durable materials and corrosion resistance ensure long operational life.
Easy Installation and Replacement
Designed for easy integration with CPVC piping systems using threaded or solvent cement connections.

Temperature (°C)	Pressure Rating (Bar)	Pressure Rating (PSI)
20°C	6 bar	87 psi
30°C	5.4 bar	78 psi
40°C	4.8 bar	70 psi
50°C	3.6 bar	52 psi
60°C	2.4 bar	35 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 Using CPVC Compact Diaphragm Valve

Excellent Chemical Resistance

CPVC material resists many corrosive chemicals, acids, and alkalis, making the valve suitable for chemical processing and water treatment applications.

Corrosion-Free Operation

Unlike metal valves, CPVC valves do not rust or corrode, ensuring long service life in aggressive environments.

Compact and Lightweight Design

The compact structure makes installation easier and saves space in piping systems.

Leak-Proof Sealing

The flexible diaphragm provides a tight seal, preventing leakage and ensuring reliable shut-off.

Low Maintenance Requirement

Simple internal construction reduces wear and tear, resulting in lower maintenance and replacement costs.

Good Flow Control

The diaphragm design allows smooth throttling and accurate flow regulation.

High Durability

CPVC offers strong mechanical strength and can withstand high temperatures compared to standard PVC valves.

Smooth Internal Surface

The smooth bore reduces friction, minimizes scaling, and improves flow efficiency.

Easy Installation

Compatible with solvent cement joints, threaded connections, or union ends for quick installation and removal.

Cost-Effective Solution

Provides reliable performance at a lower cost compared to many metal or specialty alloy valves.

Types of CPVC Compact Diaphragm Valve

Manual CPVC Compact Diaphragm Valve

Operated manually using a handwheel or knob.
Commonly used in small piping systems and laboratory applications.

Pneumatic Actuated CPVC Compact Diaphragm Valve

Operated by a pneumatic actuator using compressed air.
Suitable for automated industrial processes.

Electric Actuated CPVC Compact Diaphragm Valve

Controlled by an electric actuator.
Used in automated systems where remote operation is required.

Weir Type CPVC Compact Diaphragm Valve

Has a raised weir (saddle) inside the valve body.
Provides good sealing and is ideal for throttling applications.

Straight Through CPVC Compact Diaphragm Valve

Designed with a straight flow path.
Suitable for slurry, viscous fluids, and applications requiring minimal flow restriction.

Threaded End CPVC Compact Diaphragm Valve

Comes with threaded connections for easy installation in smaller pipelines.

Socket / Solvent Cement End CPVC Compact Diaphragm Valve

Connected using solvent cement joints.
Commonly used in CPVC piping systems for strong leak-proof joints.

Applications of CPVC Compact Diaphragm Valve

Process Industry

High Purity Applications

Electronic Industry

Electrical Industry

Semi-conductors Industry

Pharmaceutical Industry

Solar power panels

Sugar Industry

Paper & Pulp Industry

Nuclear Power Industry

Automotive Industry

DI water plants

Why Choose Petron Thermoplast?

In the field of water, fluid, and chemical technology, Petron Thermoplast Company played a leading role, known for innovation and reliability. Petron Thermoplast has engineered a high-performance CPVC Compact Diaphragm Valve that maximizes mixing efficiency and durability. Their design is patented to ensure consistent performance across a wide range of flow rates and pressures.

Petron Thermoplast CPVC Compact Diaphragm Valves are particularly favored in chemical treatment applications due to their precision, long service life, and compatibility with corrosive water. By harnessing the valve effect, these devices offer a reliable, energy-efficient method for fluid injection without the need for pumps or electricity. With companies like Petron Thermoplast pushing the technology forward, the future of fluid injection remains efficient, sustainable, and powerful