The Cast Iron Glass Lined Diaphragm Valve with a PTFE diaphragm is a robust industrial valve designed for handling highly corrosive and abrasive media. It combines the mechanical strength and cost-effectiveness of a cast iron body with the superior chemical resistance of a glass lining on all wetted surfaces. The valve utilizes a flexible PTFE (Polytetrafluoroethylene) diaphragm that acts as a barrier, isolating the valve's internal mechanism from the process fluid. When the diaphragm is pressed against the valve seat, it creates a leak-tight seal, stopping the flow. This design ensures zero leakage, prevents contamination, and protects the valve body from corrosion, making it ideal for demanding applications in chemical processing, pharmaceuticals, and water treatment.
Technical Attributes
1. **Body Material:** High-grade Cast Iron (GG25/ASTM A126).
2. **Lining Material:** Chemical-resistant Borosilicate Glass.
3. **Diaphragm Material:** Virgin PTFE backed by EPDM/Neoprene.
4. **Valve Type:** Weir-style (A-Type) diaphragm design.
5. **Corrosion Resistance:** Excellent against most organic and inorganic acids.
6. **Operating Temperature:** Typically $-20\text{°C}$ to $+150\text{°C}$ (limited by lining/diaphragm).
7. **Pressure Rating:** Class 125/150 or PN10/PN16.
8. **Connection End:** Flanged (ASME B16.5 or DIN EN 1092-2).
9. **Bore Type:** Full bore for low pressure drop and high flow coefficient ($C_v$).
10. **Sealing:** Bubble-tight shut-off (Class VI) per ANSI/FCI 70-2.
11. **Stem:** Non-rising stem design with position indicator.
12. **Operation:** Manual handwheel, pneumatic, or electric actuation.
13. **Surface Finish:** Glass lining provides a smooth, non-stick surface.
14. **Maintenance:** Top-entry design allows for in-line diaphragm replacement.
15. **Bonnet:** Sealed bonnet option available for hazardous media.
16. **Structure:** Simple three-piece design (Body, Diaphragm, Bonnet).
17. **Standardization:** Face-to-face dimensions according to EN 558-1 or MSS SP-88.
18. **Testing:** Spark testing of glass lining to ensure 100% integrity.
19. **Coating:** External epoxy coating for atmospheric corrosion protection.
20. **Application:** Ideal for sulfuric acid, hydrochloric acid, and deionized water.
Contact: Jorge Yang
Phone: +86-13588258503
E-mail: sales@fluvalve.com
Whatsapp:+86-13588258503
Add: Room 331, South Building,Building 1, No.3 Jinpeng Street, Sandun Town, Xihu District, Hangzhou City, Zhejiang Province
