PVDF Gear Operated Butterfly Valve
A PVDF Gear Operated Butterfly Valve is a quarter-turn flow control valve in which the body and disc are made of PVDF (Polyvinylidene Fluoride) and the valve is operated using a gearbox mechanism with a handwheel for smooth and controlled opening and closing. PVDF Gear Operated Butterfly Valve provides excellent resistance to corrosive chemicals and is suitable for acids, alkalis, and high-purity applications. They rotate 90° to control flow and offer a tight shut-off when closed. The Gear Operator (Worm Gear Mechanism) reduces manual effort to allow precise positioning of the valve and is ideal for larger valve sizes.
The PVDF Gear Operated Butterfly Valve is a robust and reliable quarter-turn valve designed for precise flow control in aggressive chemical and industrial environments. This PVDF Gear Operated Butterfly Valve offers outstanding chemical resistance, durability, and mechanical strength. The gear operation mechanism provides smooth, controlled valve actuation, making it suitable for larger sizes or higher pressure applications where manual leverage is required. Ideal for industries such as chemical processing, pharmaceuticals, oil, gas treatment, and semiconductor manufacturing.
- Chemical Resistance
- Low Maintenance Requirement
- Low Thermal Conductivity
- Long Service Life
- Easy Installation
- Corrosion Resistance
PVDF Gear Operated Butterfly Valve Details
D: Diameter (Outer body or flange)
DN: Diameter Nominal (Internal pipe size)
PN: Pressure Nominal (Pressure rating)
B2: Lower Body Height (Centerline to bottom)
B5: Upper Assembly Height (Centerline to top of gearbox)
B6: Handwheel Centerline Height (Centerline to handwheel axis)
H: Overall Body Width (Total horizontal span)
G: Gearbox Offset (Centerline to rear of gearbox)
G1: Handwheel Extension (Centerline to outer handwheel edge)
G3: Handwheel Diameter (Total width of the wheel)
| D (Size) | DN | PN | B | B2 | B5 | B6 | H | G | G1 | G3 |
| 75 | 65 | 10 | 80 | 174 | 146 | 165 | 48 | 135 | 125 | 90 |
| 90 | 80 | 10 | 93 | 188 | 160 | 185 | 48 | 135 | 125 | 110 |
| 110 | 100 | 10 | 107 | 202 | 174 | 211 | 48 | 135 | 125 | 140 |
| 125 | 125 | 10 | 120 | 222 | 194 | 240 | 48 | 144 | 200 | 160 |
| 140 | 150 | 10 | 134 | 235 | 207 | 268 | 48 | 144 | 200 | 225 |
| 160 | 200 | 10 | 161 | 287 | 256 | 323 | 65 | 204 | 200 | 280 |
| 200 | 250 | 10 | 210 | 317 | 281 | 405 | 88 | 236 | 250 | 315 |
| 250 | 300 | 10 | 210 | 317 | 281 | 405 | 88 | 236 | 250 | — |
| Parameter / Property | Specification / Description |
| Body Material | PVDF (Polyvinylidene Fluoride) |
| Disc Material | PVDF / Reinforced PVDF |
| Seat / Seal Material | PTFE / EPDM / FKM |
| Stem Material | SS316 / PVDF-coated SS316 |
| Operation Type | Manual gear-operated (handwheel or gearbox) |
| Size Range | 2” to 12” (DN50 to DN300), larger on request |
| Pressure Rating | PN10 (≈10 bar / 150 PSI) |
| Temperature Range | -20°C to +120°C (depends on seat material) |
| Connection Type | Wafer / Lug / Flanged |
| Flow Control | Quarter-turn (0–90°) for throttling or isolation |
| Standards | ISO, DIN, ANSI, JIS |
| Torque Requirements | Reduced torque via gear mechanism for large diameters |
| Media Compatibility | Corrosive liquids, acids, alkalis, solvents, high-purity fluids |
| — | — |
| Design Type | Lug or wafer type with gear operator |
| Disc Design | PVDF disc designed for smooth flow and tight shutoff |
| Sealing System | PTFE/EPDM seat for bubble-tight sealing |
| Gear Mechanism | Handwheel/gearbox reduces manual effort for large valves |
| Stem Design | Double offset or standard; SS316 for high strength |
| Flow Path | Full bore / concentric flow to minimize pressure drop |
| Maintenance | Removable gearbox for servicing; internal parts accessible |
| Weight | Lightweight compared to metal, though heavier than lever types |
| Surface Finish | Smooth, non-stick PVDF surface prevents scaling |
| Durability | High resistance to chemical attack, UV, and scaling |
| Installation | Suitable for horizontal or vertical pipelines |
Chemical Resistant Construction: Body and internal parts made from PVDF to withstand harsh corrosive chemicals and solvents.
Fast and Reliable Operation: Quick response solenoid coil ensures precise flow control.
Compact and Lightweight: Suitable for integration in complex piping and instrumentation systems.
Multiple Connection Options: Available in threaded, socket, or flanged ends for versatile installation.
High Electrical Insulation: Ensures safety and durability in electrically powered environments.
Low Power Consumption: Efficient coil design minimizes energy usage.
Wide Operating Temperature Range: Suitable for various industrial processes.
Maintenance Friendly: Easy coil replacement and modular design reduce downtime.
Normally Closed and Normally Open Options: Available to suit different system requirements.
1.Standard Pressure Ratings (At 20–25°C)
| Valve Size (DN / Inch) | ANSI Standard | Max Working Pressure (psi) | DIN Standard | Max Working Pressure (bar) |
| DN40–DN100 (1½″–4″) | Class 150 | 150 psi | PN16 | 16 bar |
| DN125–DN200 (5″–8″) | Class 150 | 150 psi | PN16 | 16 bar |
| DN250–DN300 (10″–12″) | Class 150 | 150 psi | PN10 | 10 bar |
| DN350–DN600 (14″–24″) | Class 150 | 150 psi | PN10 | 10 bar |
2️.Pressure–Temperature Derating (Typical for PVDF Body/Lining)
| Temperature (°C) | Approx. Allowable Pressure (bar) |
| 20°C | 10–16 bar |
| 40°C | 8–14 bar |
| 60°C | 6–12 bar |
| 80°C | 4–10 bar |
| 100°C | 3–8 bar |
| 120°C | 2–6 bar |
- Types of PVDF Gear operated Buttefly Valve
| Type | Description | Application |
| Wafer Type | Installed between two flanges using long bolts that span the valve body. | Compact piping systems where space and weight are limited. |
| Lug Type | Features threaded inserts (lugs) that allow bolts to be tightened from both sides. | End-of-line service or where one side of the pipe needs removal. |
| Flanged Type | Features a fully flanged body that matches the pipe flange dimensions. | Heavy-duty, larger pipelines requiring maximum structural integrity. |
2️. Based on Body Construction
| Type | Description | Application |
| Solid PVDF Body | Entire valve body is molded or machined from pure PVDF. | Highly corrosive environments where external corrosion is as much a threat as internal. |
| PVDF Lined Valve | A robust metal body (Ductile Iron/Steel) internally lined with a thick PVDF layer. | High-pressure applications where the chemical resistance of PVDF is needed but metal’s strength is required. |
| PVDF Coated Disc | A metal disc (Stainless Steel/Ductile Iron) encapsulated with a PVDF coating. | Used in butterfly valves to provide structural rigidity to the disc while protecting it from the media. |
3. Based on Seat Type
| Seat Material | Features | Application |
| EPDM Seat | Good for water and mild chemicals; excellent resilience. | Best for general water treatment, dilute acids, and alkalis. |
| PTFE Seat | Excellent chemical resistance; nearly universal compatibility. | Ideal for aggressive solvents, strong acids, and high-purity media. |
| Viton (FKM) Seat | Suitable for higher temperatures and harsh chemicals/oils. | Preferred for petroleum products and higher temperature chemical lines. |
4️. Based on Disc Design
| Type | Description | Application |
| Concentric (Resilient Seated) | Disc and stem are centered in the valve body; disc stays in contact with the seat through the stroke. | Most common PVDF design; ideal for general chemical and water services. |
| Double Offset (High Performance) | Stem is offset from the seat and disc centerlines, allowing the disc to “lift” off the seat quickly. | Used to reduce seat wear and friction; preferred for high-cycle or higher-pressure applications. |
| Triple Offset | Adds a third cone-shaped offset for non-rubbing, torque-seated sealing. | Rare in PVDF; typically used in high-temp metal valves for bubble-tight shutoff. |
5️.Based on Operation Type (Gear Mechanism)
| Type | Description | Application |
| Manual Worm Gear | Operated via a standard handwheel. | Standard installations where the valve is easily accessible by an operator. |
| Gear with Chain Wheel | Includes a sprocket and chain attached to the gear shaft. | For elevated installations (overhead piping) where the valve is out of reach. |
| Gear with Position Indicator | Features a visual dial or flag showing the exact degree of opening. | Critical flow control processes requiring precise confirmation of disc position. |
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 PVDF Gear Operated Butterfly Valve
1. Excellent Corrosion Resistance
- PVDF (Polyvinylidene Fluoride) offers outstanding resistance to strong acids, alkalis, salts, and solvents.
- Ideal for highly corrosive chemical environments.
- Longer service life compared to standard metal valves in aggressive media.
2️. Smooth & Controlled Operation
- The gear (worm gear) mechanism reduces operating torque.
- Easy manual operation even for larger valve sizes.
- Allows precise positioning for throttling applications.
3️. Lightweight Yet Strong
- PVDF construction is much lighter than metal valves.
- Easier handling and installation.
- Reduced structural load on piping systems.
4️. Leak-Tight Sealing
- Compatible with soft seats like EPDM or PTFE.
- Provides reliable shut-off performance.
- Suitable for both isolation and flow control.
5️. Low Maintenance
- A non-corrosive body reduces rust and scaling.
- Minimal lubrication required for gear mechanism.
- Lower maintenance costs over time.
6️. Space-Saving Design
- Wafer or lug style compact structure.
- Requires less installation space compared to gate or globe valves.
7️. Cost-Effective for Chemical Applications
- More economical than fully alloy-based metal valves.
- Reduces downtime caused by corrosion damage.
8️. Good Temperature Resistance
- Typically suitable for temperatures up to 120–140°C (depending on seat material).
- Maintains mechanical stability in moderate high-temperature services.
Applications of PVDF Gear Operated Butterfly 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?
A Petron Thermoplast provides a PVDF Gear Operated Butterfly Valve to keep connections simple and cost-effective. Selecting the right type depends on your PVDF Gear Operated Butterfly Valve setup, material, and pressure requirements. At Petron Thermoplast, we manufacture PVDF Gear Operated Butterfly Valve that meet ASME and MSS standards.
