Economy Wafer-type Butterfly Valves (CF8/CF8/PTFE)

Economy Wafer-type Butterfly Valves (CF8/CF8/PTFE)

Description

Wafer Type Butterfly Valve Technical Data Sheet

(Stainless Steel Body / PTFE Seat)

Product Name: Wafer Type Concentric Butterfly Valve
Model: D71X / D371X – Series
Date: February 16, 2026

1. Product Overview

This valve features a wafer-type body design for easy installation between pipeline flanges. The valve is constructed entirely with stainless steel wetted parts (body and disc) and a PTFE (Polytetrafluoroethylene) seat, offering excellent corrosion resistance and chemical inertness. It is ideally suited for handling aggressive media in chemical, pharmaceutical, food processing, and water treatment industries.

2. General Technical Specifications

3. Material of Parts Specification

4. PTFE Seat Characteristics

• Chemical Resistance: PTFE is chemically inert and resistant to almost all industrial chemicals and solvents, except molten alkali metals and elemental fluorine at high temperatures.
• Temperature Resistance: Maintains stability from sub-zero temperatures up to 180°C.
• Low Friction: PTFE’s low coefficient of friction ensures low operating torque and extends valve life.
• Non-Stick Surface: Precribes adhesion of media, making it ideal for viscous or sticky fluids.
• FDA Compliance: PTFE materials can be supplied to meet FDA requirements for food and pharmaceutical applications upon request.

5. Main Technical Characteristics

1. Concentric Design: The stem passes through the center line of the disc, which contacts the PTFE seat for sealing. Simple, reliable, and cost-effective.
2. Full Stainless Steel Construction: All wetted parts (body, disc) are stainless steel, providing superior corrosion resistance compared to ductile iron or coated valves.
3. PTFE Lined Seat: The seat fully lines the body bore, isolating the body from the media and ensuring bubble-tight shut-off.
4. Wafer Type Body: The valve is centered between two pipe flanges using precision-machined locating lugs, allowing for easy installation and removal without special tools.
5. Bi-Directional Sealing: The PTFE seat design provides tight shut-off in both flow directions.

6. Pressure-Temperature Rating (PTFE Seat)

Note: Pressure ratings decrease at elevated temperatures due to material properties of PTFE.

7. Principal Dimensions & Connection Data (Reference PN10/16)

*Note: Final dimensions subject to approval drawings. Conforms to ISO 5752 Series 20 / API 609 Category A.*

8. Applicable Standards & Testing

• Design & Manufacture: API 609 Category A / ISO 5752 / EN 593 / GB/T 12238
• Face à face : ISO 5752 Series 20 (Short pattern)
• Flange Compatibility: EN 1092-2, ASME B16.5 (via wafer mounting), JIS B2220
• Testing Standard: ISO 5208 / API 598
• Pressure Tests:
• Shell Test: 1.5 x Rated Pressure
• Seat Test: 1.1 x Rated Pressure (Bi-directional)
• Leakage Rate: Rate A (No visible leakage) per ISO 5208

9. Remarques

• This Stainless Steel + PTFE combination offers the best corrosion resistance for chemical applications.
• PTFE seat provides low torque operation and requires no maintenance.
• For higher temperature applications (>180°C), alternative seat materials such as RTFE or PEEK should be considered.
• Available with various disc and body options: CF8 (304), CF8M (316), or CF3M (316L) for enhanced corrosion resistance.
• Actuator mounting flange conforms to ISO 5211 for easy automation.

GARANTIE :

SAVVY VALVES s'engage à fournir des produits d'une qualité exceptionnelle et un service après-vente sans souci. Nos vannes sont garanties pour une durée de vie minimale de 12 mois, période durant laquelle nous fournissons gratuitement toutes les pièces de rechange nécessaires et des instructions d'entretien détaillées. Pendant la période de garantie, en cas de dommage non causé par l'homme, nous remplaçons gratuitement les composants et fournissons une assistance technique professionnelle. Après l'expiration de la garantie, seuls les pièces de rechange sont à votre charge, tout en bénéficiant de services de maintenance à prix réduits. Notre objectif est d'aider nos clients à réduire leurs coûts d'exploitation et à optimiser leur production grâce à une qualité fiable et un service après-vente complet. Qu'il s'agisse de questions techniques ou de besoins de maintenance, notre équipe d'experts répondra rapidement pour garantir le fonctionnement optimal de votre système de vannes.