PPH Compact Diaphragm Valve
A PPH Compact Diaphragm Valve is a type of industrial valve made from Polypropylene Homopolymer (PPH) that is used to control or regulate the flow of liquids in piping systems. It operates using a flexible diaphragm membrane that moves up and down to open, close, or throttle the flow. In this valve, the diaphragm presses against a seat or weir inside the valve body, creating a tight seal that prevents leakage. The compact design allows the valve to be installed in limited spaces, making it suitable for small and medium-sized piping systems.
PPH Compact Diaphragm Valves are widely used in chemical processing, water treatment, and corrosive fluid handling systems because PPH material offers excellent chemical resistance, corrosion resistance, and durability. The PPH Compact Diaphragm Valve consists of a flexible disc sealed with a seat at the top of the valve body. It is excellent for use in restricted spaces. This diaphragm sealing system makes PPH Diaphragm Valves & Pipe Fittings.
- Chemical Resistance
- Low Maintenance Requirement
- Low Thermal Conductivity
- Long Service Life
- Easy Installation
- Corrosion Resistance
PPH 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 | Technical Specification |
| Valve Type | Compact Weir-Type Diaphragm Valve |
| Body Material | PPH (Polypropylene Homopolymer) |
| Diaphragm Material | EPDM / PTFE / FKM (Viton) |
| Size Range | DN15 – DN150 (½” – 6”) |
| Nominal Pressure | Up to PN6 – PN10 (depending on model and size) |
| Temperature Range | 0°C to 90°C (depending on diaphragm material) |
| Connection Type | Socket Weld, Threaded, or Flanged |
| Operation Type | Manual Handwheel / Pneumatic / Electric Actuation |
| Flow Direction | Bi-directional flow |
| Mounting Position | Horizontal or Vertical installation |
| Design Standard | DIN / ISO / ASTM standards |
| Working Medium | Water, acids, alkalis, chemical solutions |
| Seal System | Flexible diaphragm sealing for leak-tight closure |
| Construction Design | Compact single-weir diaphragm design |
| Internal Components | Stainless steel stem isolated from process fluid |
| Maintenance | Easy diaphragm replacement and low maintenance |
| Property | Value / Description |
| Material | PPH (Polypropylene Homopolymer) |
| Density | 0.90 – 0.91 g/cm³ |
| Tensile Strength | 30 – 35 MPa |
| Flexural Modulus | 1300 – 1600 MPa |
| Impact Strength | Good impact resistance |
| Hardness | Shore D 65 – 75 |
| Thermal Conductivity | ~0.22 W/m·K |
| Coefficient of Thermal Expansion | 1.5 – 2.0 × 10⁻⁴ /°C |
| Maximum Working Temperature | Up to 90°C |
| Water Absorption | Very low (<0.01%) |
| Chemical Resistance | Excellent resistance to acids, alkalis, and many chemicals |
| Electrical Insulation | Good electrical insulating properties |
- Compact and Lightweight Design
The valve has a compact body structure made from PPH material, making it lightweight and easy to install in limited spaces. - High Chemical Resistance
PPH material provides excellent resistance to acids, alkalis, and corrosive chemicals, making it suitable for harsh industrial environments. - Leak-Proof Sealing
The flexible diaphragm creates a tight seal against the valve seat, ensuring reliable shut-off and preventing fluid leakage. - Corrosion-Resistant Construction
The non-metallic PPH body prevents rust and corrosion, increasing the valve’s durability and lifespan. - Smooth Internal Surface
The smooth internal design reduces friction, minimizes pressure loss, and prevents scaling or buildup inside the valve. - Low Operating Torque
The valve requires less effort to operate due to its efficient diaphragm mechanism. - Isolation of Operating Parts
Internal moving parts, such as the stem, are isolated from the process fluid, protecting them from corrosion and contamination. - Easy Maintenance
The diaphragm can be easily replaced without dismantling the entire valve, simplifying maintenance. - Multiple Connection Options
Available with various end connections, including socket weld, threaded, or flanged, allowing for flexible installation. - Suitable for Various Applications
Widely used in chemical processing, water treatment, pharmaceutical, and industrial fluid handling systems.
| Valve Size (DN) | Pressure Rating | Working Pressure | Test Pressure |
| DN15 – DN25 (½” – 1”) | PN10 | Up to 10 Bar | 15 Bar |
| DN32 – DN50 (1¼” – 2”) | PN10 | Up to 10 Bar | 15 Bar |
| DN65 – DN80 (2½” – 3”) | PN6 | Up to 6 Bar | 9 Bar |
| DN100 – DN150 (4” – 6”) | PN6 | Up to 6 Bar | 9 Bar |
Custom Product Manufacturing Available
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 PPH Compact Diaphragm Valve
Excellent Chemical Resistance
The PPH (Polypropylene Homopolymer) material provides high resistance to acids, alkalis, and many corrosive chemicals, making the valve suitable for chemical processing applications.
Corrosion-Free Performance
Unlike metal valves, PPH valves do not rust or corrode, ensuring long service life in aggressive environments.
Leak-Tight Sealing
The flexible diaphragm design provides reliable shut-off and prevents leakage, improving system safety and efficiency.
Compact and Space-Saving Design
The compact structure allows easy installation in tight or limited piping spaces.
Low Maintenance Requirements
The simple internal construction and replaceable diaphragm make maintenance easy and reduce downtime.
Smooth Flow Characteristics
The valve has a smooth internal surface that reduces pressure drop and prevents material buildup.
Good Temperature Resistance
PPH valves can operate efficiently in moderate temperature ranges used in industrial fluid systems.
Lightweight Construction
PPH material is lightweight compared to metal valves, making handling and installation easier.
Long Service Life
Due to its chemical resistance and durable diaphragm design, the valve performs reliably for extended periods.
Wide Industrial Applications
Commonly used in water treatment, chemical plants, pharmaceutical industries, and corrosive fluid handling systems.
Types of PPH Compact Diaphragm Valve
Manual PPH Compact Diaphragm Valve
This type is operated manually using a handwheel or handle to open or close the valve. It is commonly used in small and medium piping systems where manual control is sufficient.
Pneumatic PPH Compact Diaphragm Valve
This valve operates using compressed air through a pneumatic actuator. It is suitable for automated systems that require quick and frequent valve operation.
Electric (Motorized) PPH Compact Diaphragm Valve
In this type, an electric actuator controls the valve’s opening and closing. It is widely used in automated industrial processes and remote-control systems.
Weir-Type PPH Compact Diaphragm Valve
This design features a raised weir within the valve body, which enables the diaphragm to seal tightly and enhances flow control. It is the most commonly used design.
Straight-Through PPH Compact Diaphragm Valve
This type provides a straight flow path with minimal obstruction, making it suitable for slurry, viscous, or solid-containing fluids.
Applications of PPH 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?
At Petron Thermoplast, the PPH Compact Diaphragm Valve provides a highly efficient solution for streamlining flow control needs in various industrial applications, thanks to its space-saving design and reliable performance. A PPH Compact Diaphragm Valve is a versatile option for ensuring precise control over fluid flow. By investing in a compact PPH Compact Diaphragm Valve, businesses can improve efficiency, reduce maintenance costs, and enhance overall system performance. Whether used in the oil and gas industry, chemical processing plants, or other treatment facilities.
PPH Compact Diaphragm Valve offers a practical and reliable solution for managing flow control requirements. The efficiency of the H Compact Diaphragm Valve makes it an essential component for any organisation looking to optimise their flow control processes and achieve greater operational success.
