SS Grooved End Butterfly Valve – CF8M Body, PN16, OEM Manufacturer

Product Overview

A grooved end butterfly valve is a quarter-turn flow control device designed for fast, secure installation using mechanical grooved couplings. Unlike flanged or threaded valves that require welding, bolting, or threading, the grooved end design connects to the pipeline by simply inserting the valve between two couplings and tightening–reducing installation time by up to 60% and eliminating the need for hot work permits or specialized tools.

This model features a CF8M stainless steel body (AISI 316) for superior corrosion resistance, a DI (ductile iron) disc fully encapsulated in EPDM for bubble-tight sealing and complete metal isolation from the process fluid, and an SS420 stainless steel stem for robust torque transmission–rated at PN16 (16 bar) . The EPDM encapsulation on the disc protects the ductile iron core from corrosion while providing a resilient sealing surface that compresses against the seat for zero-leakage shut-off.

As a direct OEM/ODM manufacturer with over 19 years of export experience, Tianjin Worlds Valve Co., Ltd. delivers fully customizable grooved end butterfly valves–materials, sizes, pressure ratings, 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:

Grooved End Butterfly Valve | CF8M Body | DI disc fully encapsulated in EPDM |PN16

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

RGV02-TG01 - Detailed Product Info

Technical Specifications

 

Key Features & Advantages

1. Grooved End Connection–Fast Installation, No Welding

• Quick & Simple Installation–The valve connects to the pipeline using two mechanical grooved couplings. Just insert the valve between couplings and tighten–no welding, no threading, no flange bolting. Installation time is reduced by up to 60% compared to flanged valves.

• No Hot Work Required–Eliminates the need for welding permits, fire watches, and specialized welding skills–a critical advantage in hazardous areas, retrofit projects, and confined spaces.

• Maintenance-Friendly–The valve can be easily removed and reinstalled using the same grooved couplings, simplifying maintenance and replacement without disturbing the rest of the piping system.

• Space-Saving Design–Grooved end butterfly valves are more compact than flanged alternatives, requiring less space in tight equipment rooms and crowded pipe racks.

• AWWA C606 Compliance–Grooved ends are manufactured to AWWA C606 standards, ensuring compatibility with standard grooved couplings worldwide.

 

2. Body Material–CF8M Stainless Steel (AISI 316)

• Superior Corrosion Resistance–CF8M offers excellent resistance to pitting and crevice corrosion, particularly in chloride environments, seawater, and aggressive media–significantly outperforming 304 stainless steel (CF8) in demanding conditions.

• Wide Chemical Compatibility–Suitable for water, wastewater, mild chemicals, acids, and alkalis–ideal for chemical processing, pharmaceutical, and marine applications.

• Hygienic and Non-Toxic–The material is safe for potable water, food processing, and pharmaceutical applications.

• Extended Service Life–The corrosion-resistant properties of CF8M ensure long-term reliability even in aggressive environments, reducing replacement frequency and maintenance costs.

 

3. Disc Material–DI with EPDM Full Encapsulation

• Complete Metal Isolation–The ductile iron core is fully encapsulated in EPDM, ensuring zero metal contact with the process fluid. This eliminates corrosion, pitting, and contamination risks entirely.

• Bubble-Tight Sealing–The EPDM encapsulation creates a resilient sealing surface that compresses against the seat when closed, delivering bubble-tight shut-off certified to EN 12266-1 and API 598.

• Superior Chemical Resistance–EPDM offers excellent resistance to water, wastewater, dilute acids, alkalis, and common water treatment chemicals including chlorine and ozone.

• Maximum Flow Capacity–The encapsulated disc design eliminates the need for a separate liner between the disc and seat, allowing for a larger flow passage and higher Cv values.

• Wide Temperature Range–EPDM maintains sealing properties from -20°C to +120°C, covering the full range of typical water system and industrial service temperatures.

 

4. Stem Material–SS420 Stainless Steel

• High Strength–SS420 offers significantly higher tensile strength than 304/316 stainless steel, ensuring reliable torque transmission even in larger diameter valves.

• Excellent Wear Resistance–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, ensuring safe operation.

 

5. ISO 5211 Top Flange–Ready for Automation

All our grooved end butterfly valves feature a standard ISO 5211 top flange, providing universal interchangeability for various actuation methods:

• Hand Lever–Quick manual on-off control with locking plate (smaller sizes)

• Gear Operator–Self-locking with open-close indicator (larger sizes)

• Electric Actuators–On-off or modulating types with 4-20 mA feedback, manual override, PLC/SCADA integration

• Pneumatic Actuators–Double-acting or spring-return (fail-safe) designs

• Hydraulic Actuators–High-torque, subsea, or explosive environments

 

Typical Applications

Grooved end butterfly valves with CF8M body and EPDM-encapsulated disc are trusted across a wide range of industries:

• Water Supply & Distribution–Municipal water mains, pumping stations, distribution networks.

• Wastewater Treatment–Sewage lines, treatment plants, effluent systems.

• Chemical Processing–Corrosive fluids, acids, alkalis (with CF8M body and EPDM encapsulation) .

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

• Food & Beverage–Sanitary processing, cleaning agents.

• HVAC Systems–Chilled water, hot water, cooling tower systems.

• Fire Protection–Fire water lines, sprinkler systems, deluge systems

• Marine & Offshore–Seawater cooling, ballast water systems

 

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.

• Grooved Valve Specialists. We have extensive experience manufacturing grooved end butterfly valves for water, chemical, and industrial projects worldwide. Our grooved ends are machined to AWWA C606 standards for reliable coupling compatibility.

• CF8M Body Expertise. We manufacture CF8M (AISI 316) valve bodies for superior corrosion resistance in aggressive environments–ideal for chemical, pharmaceutical, and marine applications.

• Full Encapsulation Technology. Our DI disc with EPDM full encapsulation ensures zero metal contact with the process fluid, delivering bubble-tight sealing and extended service life.

• Full Customization. Materials, sizes, pressure ratings, 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 Grooved Valve Today:

Whether you need this PN16 configuration with CF8M body and EPDM-encapsulated disc, 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 / stem)

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

• Grooved end standard (AWWA C606 / ISO 6182)

• 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.