PTFE-Lined Butterfly Valves

Short Description:

Product Name: Fluorine Lined Butterfly Valve
Valve Category: Fluorine‑lined Valves
Brand: Yiluoke
Technical Data: DN15-DN600
Made In: China
Supplier: Xiamen Yiluoke Import and Export Trading Co., Ltd

Product Detail

The PTFE‑lined butterfly valve is designed for corrosive environments with strong acids and strong alkalis, meeting application requirements in petroleum, chemical, food and other special industries. Fluoroplastics such as F46 and PTFE are lined on the inner surface of valve body and butterfly plate of conventional butterfly valves, isolating the process medium from the valve body to achieve anti‑corrosion performance.

PTFE-Lined Butterfly Valve.webp

Structural Features

1. Split‑type valve body with full‑shaft and half‑shaft pin‑free connection.

2. The valve seat adopts one‑step compression molding technology. Back‑lined high‑elastic rubber is tightly bonded with PTFE to reduce seat deformation and realize zero leakage under rated pressure. Meanwhile, the F4 seat adopts popular wide flanged structure for convenient flange sealing.

3. The butterfly plate is externally lined with 3‑5mm thick PTFE. Spherical cross‑section sealing fit is adopted between seat and butterfly plate. Smooth opening transition reduces friction and torque to achieve more reliable sealing performance.

4. Axial positioning structure guarantees zero‑leakage performance for long‑term operation.

5. All medium‑contact components adopt F4 material to realize complete isolation from medium and extend service life.

6. This valve can resist almost all chemical media.

7. Before delivery, molded butterfly plates pass 20kV DC high‑voltage electric shock test to verify anti‑corrosion performance. Complete valve sealing and strength tests are also performed.

8. Various installation forms and driving modes can be conveniently selected according to customer requirements.

9. Nominal pressure: PN0.6 / 1.0 / 1.6MPa

10. Working temperature: -20℃ ~ +180℃

Product Models

Manual	D41F4/P(Semi‑lined)	D41F46/P(Semi‑lined)	D41F4(Full‑lined)	D41F46(Full‑lined)
Worm Gear	D341F4/P(Semi‑lined)	D341F46/P(Semi‑lined)	D341F4(Full‑lined)	D341F46(Full‑lined)
Pneumatic	D641F4/P(Semi‑lined)	D641F46/P(Semi‑lined)	D641F4(Full‑lined)	D641F46(Full‑lined)
Electric	D941F4/P(Semi‑lined)	D941F46/P(Semi‑lined)	D941F4(Full‑lined)	D941F46(Full‑lined)

Parts Material

No.	Part Name	Grey Cast Iron(Z)	Cast Steel(C)	Stainless Acid‑resistant Cast Steel(P,R)	Ultra‑low Carbon Stainless Acid‑resistant Cast Steel(PL,RL)
1	Valve Body / Bonnet	HT250	WCB	CF8, CF8M	CF3, CF3M
2	Butterfly Plate	WCB	CF8	CF8M	CF3, CF3M
3	Valve Stem	1Cr13	2Cr13	1Cr18Ni9Ti, 1Cr18Ni12Mo2Ti	00Cr18Ni10, 000Cr17Ni14Mo2
4	Lining / Seat	PTFE(F4), PCTEF(F3), FEP(F46), PFA(Soluble F4), PP, PO
5	Fastening Pin	2Cr13	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti	00Cr18Ni10, 000Cr17Ni14Mo2
6	Packing	PTFE(F4)
7	Packing Gland	WCB	CF8	CF8M	CF3, CF8
8	Bracket	WCB	CF8	CF8	CF8
9	Bolt	35	1Cr17Ni2	1Cr18Ni2
10	Nut	45	1Cr18Ni9	0Cr18Ni9

Technical Parameters of PTFE‑Lined Flange Butterfly Valve

Nominal Diameter DN(mm)	50～1600
Nominal Pressure PN(MPa)	0.6	1.0	1.6
Sealing Test(MPa)	0.66	1.1	1.76
Strength Test(MPa)	0.9	1.5	2.4
Applicable Temperature	Nitrile rubber:‑40℃～90℃; Fluororubber:‑20℃～200℃
Applicable Medium	Water, air, natural gas, oil products and weakly corrosive fluids
Leakage Rate	Comply with GB/T13927‑92 standard
Driving Mode	Electric
Matching Actuator	Pneumatic actuator and electric actuator are optional
Control Mode	Switch position indicator (two‑position on‑off control), intelligent regulation (4‑20mA analog signal control)

Performance Specification

Nominal Diameter DN(mm)	50～1600
Nominal Pressure PN(MPa)	0.6	1.0	1.6
Test Pressure	Strength Test(MPa)	0.9	1.5	2.4
	Sealing Test(MPa)	0.66	1.1	1.76
	Air‑tightness Test(MPa)	0.6	0.6	0.6
Applicable Temperature	≤150℃
Applicable Medium	Corrosive media

Application Fields

As pipeline on‑off and flow control components, PTFE‑lined butterfly valves and rubber‑lined butterfly valves are widely used in petroleum, chemical, metallurgy, hydropower and other industries. Sealing materials include rubber, PTFE and so on. Restricted by structural characteristics, they are not suitable for working conditions requiring high temperature resistance, high pressure resistance, corrosion resistance and wear resistance.

PTFE-Lined Butterfly Valves.webp