DN100 wafer type PTFE Lining Butterfly Valve 4" Butterfly Valve

DN100 (4 inch) wafer type PTFE lined butterfly valve is engineered for superior corrosion resistance in aggressive chemical environments. The valve body is fully lined with polytetrafluoroethylene (PTFE), providing an inert barrier that protects the valve from corrosive media while maintaining excellent flow control performance.

Manufactured to international standards, this wafer-style butterfly valve features a compact, lightweight design that fits between ANSI Class 150 or PN10/PN16 flanges, making it easy to install and maintain in existing pipeline systems.

Size

DN40-DN1200

Flange

PN6/PN10/PN16/150LB/10K/Table D /Table E

Design

EN593/API609/BS5155/ISO5211/EN1092

Mounting Flange

ISO 5211

Testing Standard

API598 ISO5208 EN12266-1

Description
miaoshu

Key Features

Full PTFE Lining: Valve body and disc encapsulated with virgin PTFE for exceptional resistance to acids, alkalis, salts, and organic solvents.
Bi-Directional Sealing: Precision-machined PTFE-lined disc provides tight shut-off in both flow directions.
Wafer Type Design: Compact and lightweight, designed for installation between flanges, reducing overall system weight and cost.
Anti-Blowout Stem: One-piece stem design with anti-blowout feature ensures maximum operational safety.
Low Operating Torque: Optimized disc profile reduces torque requirements, extending actuator life.
Corrosion Resistant: Suitable for chlorine, hydrochloric acid, sulfuric acid, nitric acid, acetic acid, and many other aggressive media.
ISO 5211 Top Flange: Direct mounting for all standard actuators — manual, pneumatic, or electric.
OEM/ODM Service: Customizable stem length, liner material, and actuation methods available.

Technical Specifications

Parameter	Specification
Valve Type	Wafer Type PTFE Lined Butterfly Valve
Size	DN100 (4 inch / 100 mm)
Pressure Rating	PN10 / PN16 / Class 150
Face-to-Face Dimension	EN 558 Series 20 / API 609
Flange Standard	EN 1092-1 / ASME B16.5
Temperature Range	-20°C to +180°C (-4°F to +356°F)
Lining Material	Virgin PTFE (Polytetrafluoroethylene)
Body Material	Cast Iron / Ductile Iron / Carbon Steel
Disc Material	Ductile Iron / Stainless Steel (PTFE encapsulated)
Stem Material	Stainless Steel
Seat / Seal	PTFE / FEP / PFA
Operation	Manual (Lever / Gearbox) / Pneumatic / Electric
Top Flange	ISO 5211 Direct Mounting
Leakage Rate	Class VI (Tight Shut-Off)
Suitable Media	Acids, Alkalis, Chemical Solvents, High-Purity Fluids

Applications

Chemical processing and petrochemical plants
Pharmaceutical and biotechnology manufacturing
Food and beverage processing
Water and wastewater treatment
Electroplating and surface finishing
Mining and metallurgy
Pulp and paper industry
Marine and offshore systems

Standards & Certifications

Design & Manufacturing: API 609, EN 593, GB/T 12238
Flange Connection: ASME B16.5, EN 1092-1
Face-to-Face: API 609, EN 558
Testing: API 598, EN 12266-1
ISO 9001:2015 Quality Management System
CE / UKCA Available

Ordering Information

When ordering, please specify the following:

Valve size: DN100 (4")
Pressure rating: PN10 / PN16 / Class 150
Lining material: PTFE / FEP / PFA
Body material
Operation type: Lever / Gearbox / Pneumatic / Electric
Quantity required

Contact Laux Valve Today
Email: james@lauxvalve.com
WhatsApp/Phone: +86 18920833829
Website: www.lauxvalve.com

Working/Testing Pressure

Size	DN	40mm-300mm	350mm-1200mm
	Inch	1-1/2''-12''	14''-24''
Working		10bar
Testing	Shell	15bar
	Seal	11bar

Working Temperature

Seat Material	EPDM	NBR	FKM	PTFE
Temperature	-10℃ to 120℃	-10℃ to 80℃	-15℃ to 200℃	-25℃ to 180℃

Material Specification

Part	Material
Body	Ductile Iron CF8 CF8M CF3M Duplex Steel Al-Bronze
Disc	WCB CF8 CF8M CF3M Duplex Steel /PTFE
Shaft	SS431 SS316 17-4PH
Seat	PTFE/PFA
Bushing	Stainless Steel Ring
Lever	Malleable Iron Carbon Steel Aluminum SS316
Gear Box	Ductile Iron Aluminum SS316

Corrosion Protection

Epoxy Resin Powder Spray,The minimum thickness is not less than 300 microns

NOTE:

*The shaf end can be doubl D and key connecton. From DN700 and above, the shaf end is double key type.

*The ﬂange connecton of the above table can be DIN2501 PN16, ASME B16.47-A 125/150LB, BS4504 PN10/PN16, JIS 10K,Table D ,Table E

Butterfly Valve Manufacturing Process
From Technical Confirmation to Final Delivery

Standardized Quality Control Process

From raw material inspection to final delivery, every butterfly valve undergoes a comprehensive quality inspection to ensure reliable performance and compliance with international standards.