PVDF Diaphragm Valve Spigot

A PVDF Diaphragm Valve Spigot is a valve made from Polyvinylidene Fluoride (PVDF), featuring a diaphragm mechanism to regulate, start, or stop the flow of fluids. The “spigot” type refers to valve ends that are plain (smooth) and designed to be butt-fused, solvent-welded, or mechanically connected to pipes rather than threaded or flanged. The PVDF Diaphragm Valve Spigot separates the fluid from the valve’s mechanical components, ensuring a leak-proof, corrosion-resistant, and contamination-free flow.

The PVDF Diaphragm Valve Spigot is a specialized valve designed for precise flow control and isolation in corrosive and demanding industrial environments. It offers exceptional chemical resistance, mechanical strength, and durability. The spigot end connection provides a smooth and secure fit into piping systems without the need for flanges or threads, simplifying installation in compact spaces. This diaphragm valve uses a flexible elastomeric diaphragm to regulate flow, ensuring leak-tight sealing and minimal contamination, making it ideal for applications in chemical processing, pharmaceuticals, oil & gas treatment, and semiconductor industries.

PVDF Diaphragm Valve Spigot Details

DN: Diameter Nominal
PN: Pressure Nominal
D: Diameter
H: Overall Width/Length
H2: Handwheel/Actuator Diameter
B1: Lower Body Height
L: Face-to-Face Length

DN	PN	B1	H	H2	L
15	10	25	124	80	16
20	10	30	144	80	19
25	10	33	154	80	22
32	10	30	174	80	26
40	10	35	194	120	31
50	10	46	224	120	38
65	10	46	284	120	44
80	10	55	300	200	51
100	10	69	340	250	61

Parameter / Property	Specification / Description
Body Material	PVDF (Polyvinylidene Fluoride)
Diaphragm Material	PTFE / EPDM / FKM / PFA
Seat Material	PVDF / PTFE-lined body
Size Range	½” to 6” (DN15 to DN150), larger on request
Pressure Rating	PN10 (≈10 bar / 150 PSI)
Temperature Range	-20°C to +120°C (depends on diaphragm material)
Connection Type	Spigot (socket/welded insertion into pipeline)
Operation Type	Manual (handwheel) / Pneumatic actuator / Electric actuator
Flow Control	On/off or throttling; linear flow control
Standards	ISO, DIN, ANSI
Media Compatibility	Strong acids, alkalis, corrosive chemicals, solvents, high-purity fluids
—	—
Design Type	Weir type or straight-through diaphragm valve
Construction	PVDF body with spigot ends for welded pipeline connection
Flow Path	Smooth, straight-through for minimal turbulence
Sealing System	Flexible diaphragm isolates fluid from stem and bonnet
Diaphragm Operation	Compresses against seat to stop flow; lifts for regulation
Stem Material	SS316 or PVDF-coated SS316
Maintenance	Easy diaphragm replacement without pipeline disassembly
Weight	Lightweight compared to metal valves
Durability	Resistant to aggressive chemicals, UV, and scaling
Installation	Spigot ends allow solvent welding or socket joining

Superior Chemical Resistance: PVDF body ensures excellent resistance to a wide range of aggressive chemicals and solvents.
Spigot End Connection: Allows easy insertion into pipes with solvent welding or butt fusion, providing a secure and seamless joint.
Diaphragm Sealing: Flexible diaphragm isolates the fluid from the valve’s mechanical parts, preventing contamination and leakage.
Smooth Flow Control: Offers precise throttling capabilities with minimal pressure loss.
Corrosion and Wear Resistant: Durable construction for extended service life in harsh environments.
Compact Design: Ideal for installations with limited space due to its spigot connection and lightweight build.
Wide Application Range: Suitable for chemical, pharmaceutical, water treatment, and semiconductor process lines.
Low Maintenance: Simple design with easy diaphragm replacement reduces downtime.

Valve Size (DN / inch)	Max. Pressure at 20°C (psi/bar)	Max. Pressure at 60°C (psi/bar)	Max. Pressure at 80°C (psi/bar)
DN 15 / ½″	145 psi / 10 bar	116 psi / 8 bar	87 psi / 6 bar
DN 20 / ¾″	145 psi / 10 bar	116 psi / 8 bar	87 psi / 6 bar
DN 25 / 1″	145 psi / 10 bar	116 psi / 8 bar	87 psi / 6 bar
DN 32 / 1¼″	145 psi / 10 bar	116 psi / 8 bar	87 psi / 6 bar
DN 40 / 1½″	116 psi / 8 bar	87 psi / 6 bar	58 psi / 4 bar
DN 50 / 2″	116 psi / 8 bar	87 psi / 6 bar	58 psi / 4 bar
DN 65 / 2½″	87 psi / 6 bar	58 psi / 4 bar	36 psi / 2.5 bar
DN 80 / 3″	87 psi / 6 bar	58 psi / 4 bar	36 psi / 2.5 bar
DN 100 / 4″	58 psi / 4 bar	36 psi / 2.5 bar	29 psi / 2 bar

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 PVDF Diaphragm Valve Spigot

1. High Chemical Resistance

PVDF material resists most acids, bases, and solvents.
Ideal for corrosive chemicals, aggressive acids, and halogens.

2. Contamination-Free Flow

The diaphragm separates the fluid from the valve’s mechanical parts.
Prevents contamination and particle generation—crucial in pharmaceutical, semiconductor, and ultrapure water systems.

3. Leak-Proof Design

Flexible diaphragm ensures a tight shut-off.
Reduces risk of leakage compared to traditional valves.

4. Temperature and Pressure Capability

Can operate at temperatures up to ~80°C with reduced pressure.
Suitable for many industrial applications requiring moderate temperature and pressure resistance.

5. Easy Installation

Spigot ends allow butt fusion, socket fusion, or solvent welding.
No flanges or threads required, simplifying piping layout.

6. Durability and Longevity

PVDF is UV and abrasion-resistant, making valves durable even in harsh environments.
Resistant to creep and stress cracking over time.

7. Smooth Flow and Low Pressure Drop

Diaphragm valves have a straight-through flow path when open, minimizing turbulence.
Ideal for sensitive liquids that must not be sheared or disturbed.

8. Versatile Applications

Used in chemical processing, water treatment, pharmaceutical, food & beverage, and semiconductor industries.

Types of PVDF Diaphragm Valve Spigot

1. Manual PVDF Diaphragm Valve Spigot

Hand-operated using a handwheel or lever.
Simple design, easy to install and maintain.
Small pipelines, low-flow systems, or where frequent manual operation is needed.

2. Pneumatic PVDF Diaphragm Valve Spigot

Operated using compressed air through an actuator.
Fast operation, remote control capability, and suitable for automated systems.
Industrial chemical lines, water treatment plants, and automated fluid control systems.

3. Electric / Motorized PVDF Diaphragm Valve – Spigot

Uses an electric actuator to open/close the valve.
Precise control integrates with control systems for remote or programmable operation.
High-precision chemical dosing, process automation, and industrial pipelines require exact flow control.

4. Normally Open / Normally Closed Configuration

Valve remains closed when no external force is applied.
Valve remains open by default; it closes when actuated.
Depends on the fail-safe requirement in the process design.

5. Single-Acting vs. Double-Acting Pneumatic Valves

Spring returns the valve to its default position (open or closed).
Requires air pressure to open and close; no spring.
Double-acting for precise control, single-acting for safety/fail-safe operations.

6. Lined or Unlined Diaphragm Variants

PTFE Lined Diaphragm: Offers extra chemical resistance.
Rubber Diaphragm (EPDM, Viton, etc.): Suitable for specific chemicals or temperature ranges.
Selection depends on fluid compatibility.

Applications of PVDF Diaphragm Valve Spigot

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 PVDF Diaphragm Valve Spigot provides unmatched chemical resistance, temperature tolerance, and durability, making it the best choice for demanding industries. PVDF Diaphragm Valve Spigot provides a combination of resistance, purity, and long service life. Petron Thermoplast company states that they need both safety and performance.