PTFE Wafer Butterfly Valve – PTFE Encapsulated Disc, Class 150, OEM Manufacturer

Product Overview

A PTFE wafer butterfly valve is designed for applications where chemical resistance and fluid purity are non-negotiable. The wafer body sits between two pipe flanges, keeping the face-to-face dimension short and the overall weight low–a practical choice for chemical dosing skids, pharmaceutical clean utilities, and retrofit projects where space is tight.

This model pairs a ductile iron body with a CF8M (AISI 316) stainless steel disc fully encapsulated in PTFE, a PTFE seat, and a 17-4PH stainless steel stem–rated at Class 150 and operated by a hand lever with locking plate.

The PTFE encapsulation on the disc and the PTFE seat work together to create a chemically inert wetted path. With a pH resistance range of 0 to 14, PTFE handles concentrated acids, caustics, solvents, and oxidizers that would rapidly degrade elastomeric seats or corrode unlined metal components. The 17-4PH stem–a precipitation-hardening stainless steel with tensile strength up to 1,100 MPa–provides the mechanical strength needed for reliable torque transmission through thousands of cycles.

As a direct OEM/ODM manufacturer with over 15 years of export experience, Tianjin Worlds Valve Co., Ltd. delivers fully customizable PTFE wafer butterfly valves–materials, sizes, pressure ratings, flange standards, coatings, and actuators–all tailored to your exact specifications. Our products are exported to more than 50 countries and backed by ISO 9001 (certified by LRQA), CE, UKCA, WRAS, and ACS certifications.

Introduce:

PTFE Butterfly Valve | DI Body | PTFE Coated CF8M Disc | Class 150 | Handwheel

Tianjin Worlds Valve Co., Ltd.–Your Reliable Source for Durable, Cost-Effective Flow Control

CBF04-TA04 - Detailed Product Info

Technical Specifications

This model is configured with the following parameters. Please note that every item listed below is customizable to your specific needs.

Key Features & Advantages

1. Wafer Type Design–Compact & Space-Saving

• Short Face-to-Face–The wafer body fits between two pipe flanges, requiring minimal pipeline length–ideal for chemical dosing skids and compact plant layouts.

• Lightweight–Significantly lighter than flanged or lug designs, simplifying handling and reducing structural load on piping supports.

• Fast Installation–Simply center the valve between flanges and tighten the through-bolts–no welding, no threading, no special tools required.

2. Disc–CF8M Stainless Steel with PTFE Full Encapsulation

• Zero Metal Contact–The CF8M core is fully encapsulated in PTFE, ensuring no metal surface touches the process fluid. This eliminates corrosion, pitting, and contamination risks entirely.

• Chemically Inert Surface–PTFE resists virtually all industrial chemicals across the full pH range of 0–14, including concentrated sulfuric acid, hydrochloric acid, sodium hydroxide, and organic solvents.

• Structural Integrity–The CF8M stainless steel core provides rigidity and strength, while the PTFE encapsulation delivers the chemical resistance and sealing performance.

• Non-Stick Surface–The smooth PTFE surface prevents buildup and simplifies cleaning – particularly important in pharmaceutical and food-grade applications.

3. Seat Material–PTFE

• Universal Chemical Resistance–PTFE withstands a pH range of 0–14, making it compatible with almost all aggressive media except molten alkali metals and elemental fluorine.

• Wide Temperature Range–PTFE maintains dimensional stability and sealing properties from -200℃ to +260℃ , covering both cryogenic and elevated-temperature process conditions.

• Low Friction–PTFE's low coefficient of friction reduces operating torque and extends seat life, even after repeated cycling.

• Bubble-Tight Shut-Off–The PTFE seat compresses against the encapsulated disc to deliver zero-leakage sealing per API 598.

4. Stem Material–17-4PH Stainless Steel

• High Strength–17-4PH is a precipitation-hardening stainless steel offering tensile strength up to 1,100 MPa–significantly higher than 304/316, ensuring reliable torque transmission.

• Excellent Corrosion Resistance–With 15.5–17% chromium and 3–5% nickel, 17-4PH resists corrosion in water, mild chemicals, and marine atmospheres, outperforming standard martensitic grades.

• Wear Resistant–The hardened surface resists galling and fretting during repeated cycling, extending the operational life of the stem-to-bearing interface.

• Blow-Out Proof Design–Retention mechanism prevents accidental stem ejection under pressure surges, designed per API 609 standards.

5. Hand Lever Operation–Simple & Reliable

• Quarter-Turn Control–The lever rotates 90° from fully open to fully closed, providing fast, precise flow control.

• Locking Plate Included–The lever features a locking plate that holds the valve in position and prevents accidental operation during maintenance.

• ISO 5211 Mounting–Standardized top flange allows easy upgrade to electric or pneumatic actuation if needed.

6. Class 150 Rating–Standard Pressure Capability

• Wide Compatibility–Class 150 is the most common pressure rating for industrial piping systems in North America and many other regions, ensuring easy integration with existing flanges. The cold working pressure (CWP) rating for Class 150 butterfly valves is typically 285 psi (20 bar) .

• Reliable Performance–The ductile iron body and 17-4PH stem handle Class 150 service with a safety margin, even under pressure surges and thermal cycling.

Typical Applications

PTFE wafer butterfly valves with encapsulated disc and PTFE seat are trusted across a wide range of industries:

• Chemical Processing–Acids, alkalis, solvents, oxidizers, and aggressive media.

• Pharmaceutical–High-purity water, CIP/SIP systems, sterile processing.

• Food & Beverage–Acidic foods, cleaning agents, sanitary fluids.

• Semiconductor–Ultra-pure water, electronic-grade chemicals.

• Water Treatment–Chlorine, ozone, chemical dosing.

• Pulp & Paper–Bleaching chemicals, corrosive liquors.

Why Choose Tianjin Worlds Valve?

• Quality you can trust. Our ISO 9001:2015 certification is issued by LRQA, one of the world's most respected certification bodies. Every valve comes with material certificates and pressure test reports–no exceptions.

• PTFE Encapsulation Specialists. We have extensive experience manufacturing valves with PTFE-encapsulated discs and PTFE seats for chemical, pharmaceutical, and high-purity applications. Our encapsulation process ensures complete metal isolation and long-term reliability.

• 17-4PH Stem Advantage. The 17-4PH stem provides significantly higher strength and corrosion resistance than standard 304/316 stems–delivering reliable performance in demanding service conditions.

• Full Customization. Materials, sizes, pressure ratings, flange standards (ANSI, DIN, JIS, BS), coatings (any RAL color), actuators–all to your specification.

• 19+ Years Export Experience. Smooth logistics and after-sales support to 50+ countries across Europe, Americas, Middle East, and Southeast Asia.

• 100% Traceability. Material certificates and pressure test reports with every order–no exceptions.

• Quick Turnaround. Dedicated project manager; typical lead time 15–40 days. Factory visits welcome in Tianjin.

Get in Touch–Customize Your PTFE Valve Today:

Whether you need this Class 150 configuration with PTFE-encapsulated disc and PTFE seat, a different size, automated actuation, or a complete valve package for a large-scale project–we're ready to build to your specification.

Send us your requirements:

• Required size and pressure rating

• Media type and operating temperature

• Preferred material combination (body / disc / seat)

• Actuator type (manual, gear, electric, pneumatic, hydraulic)

• Flange standard and drilling (ANSI, DIN, JIS, BS)

• Coating color (any RAL)

• Target quantity and destination port

Our team will respond within 24 hours with a quotation and engineering proposal.

Factory visits welcome–come see how we manufacture your valves in Tianjin, China.

Contact Us Now and Let's Build Your Valve Together.