What types of industrial valves does Tianjin Top Valve manufacture?

We manufacture resilient-seated butterfly valves (wafer, lug, double-flanged and grooved-end), check valves (dual plate, wafer lift, silent and ball type), resilient seat gate valves (rising stem, non-rising stem, buried and DIN pattern), globe valves for water, ammonia, vacuum and power-station service, as well as ball valves and eccentric plug valves.

Are your butterfly valves approved for drinking water?

Selected models, including 4020G, 4020L, 4325G and 4325L, are WRAS approved for potable water applications. Request our catalog to receive the approval reference and material declaration for each model.

Do you produce your own rubber seats and castings?

Yes. Our group operates Tianjin Dongfang Rubber Factory (since 1987) and Tianjin Donglian Valve Factory (since 1996), with an independent foundry, rubber compounding and moulding, a CNC machining center, assembly lines and a physical and chemical laboratory. This lets us control elastomer quality and casting integrity in-house.

Which quality and management certifications do you hold?

Our management system meets ISO 9001 quality management, ISO 14001 environmental management and ISO 45001 occupational health and safety standards, together with EU (CE) conformity for applicable products.

Can you supply valves to international flange and dimension standards?

Depending on the model, valves can be supplied with flange drilling to EN 1092 PN10/PN16, ASME/ANSI Class 125/150, BS and JIS, and our German-standard gate valves follow DIN face-to-face dimensions. Always confirm the exact standard on the model datasheet before ordering.

How can I get datasheets, drawings and a product catalog?

Request a catalog online or email victor@dytopvalve.com with your size, pressure rating, media and connection type. Our engineering team replies within 24 hours with datasheets, dimensional drawings and material specifications.

Where is your factory located and how are orders shipped?

Our factory is in the Wuxia Industrial Park, Dongli District, Tianjin, China, with fast road access to Tianjin Port. We export to customers in more than 50 countries using protective packaging and sea, air or rail freight.

Wholesale PTFE Lined Butterfly Valve - Durable & Corrosion Resistant Manufacturers, Manufacturer

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Wholesale PTFE Lined Butterfly Valve - Durable & Corrosion Resistant Manufacturers, Manufacturer

PTFE Lined Butterfly Valve uses a butterfly plate that rotates together with the valve stem as the opening and closing member to achieve the start, closing, and adjustment of the valve.

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Product Description

Application

Good wear resistance: Excellent wear resistance under high load conditions.

Smaller torque: Features the lowest friction coefficient among solid materials (0.05-0.15), keeping the operating torque significantly lower than standard valves.

Excellent chemical properties: Inert to most chemicals and solvents; resistant to strong acids, alkalis, water, various organic solvents, and strong oxidants.

Non-adhesive: Boasts minimal surface tension among solid materials, preventing adhesion to any substance.

Advanced pinless connection technology: Ensures complete isolation between the medium and metal, enhancing product reliability and making butterfly valve maintenance effortless, saving both time and labor.

Protective coating: Fully spray-coated with plastic for a refined appearance and superior external anti-corrosion performance.

Good temperature resistance: PTFE components perform continuously up to 260°C and maintain structural resilience without brittleness at -180°C.

Product Performance Specification

Nominal Diameter	Nominal Pressure	Applicable Temperature	Applicable Media	Connection Type	Connection Standard
DN40-DN200 (1.5”~80”)	PN1.0-1.6MPa	-30~150 ℃	Strong acid, strong alkali, metal etchant, liquid oxygen, desulfurization liquid, sea water, drinking water, food, etc.	Wafer type (flangeless A type, U type, single flange type), Single clamp type (LT body), double flange	GB/DIN/BS/JIS/ASME/EN/ANSI/ISO

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Frequently Asked Questions

What types of media are suitable for this butterfly valve?

This butterfly valve is designed for challenging applications and is compatible with strong acids, strong alkalis, metal etchants, liquid oxygen, desulfurization liquids, sea water, drinking water, food products, and diverse organic solvents.

What are the operational temperature limits?

The standard applicable temperature range for normal operation is -30°C to 150°C. The PTFE material can operate continuously at temperatures up to 260°C and maintains integrity without embrittlement down to -180°C.

What connection types and flange standards are available?

It supports Wafer type (flangeless A type, U type, single flange type), Single clamp type (LT body), and double flange designs. It complies with major global standards including GB, DIN, BS, JIS, ASME, EN, ANSI, and ISO.

Why does this valve require significantly smaller operating torque?

The valve utilizes materials with the lowest friction coefficient available in solid substances (between 0.05 and 0.15), reducing mechanical resistance and requiring far less actuator or manual torque than ordinary valves.

What are the advantages of the pinless connection design?

The advanced pinless connection isolates the operating medium completely from metallic components, drastically reducing corrosion risks, increasing service life, and simplifying routine maintenance to save labor and time.

What is the available size and pressure rating range?

The nominal diameter spans from DN40 to DN200 (1.5” to 80”) with nominal working pressures rated from PN1.0 to 1.6MPa.