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.

High-Quality PTFE Lined Pinless Butterfly Valve Supplier, Factories

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High-Quality PTFE Lined Pinless Butterfly Valve Supplier, Factories

PTFE is generally called non-stick coating or easy-to-clean material. It is a synthetic polymer material that uses fluorine to replace all hydrogen atoms in polyethylene. It is widely used in chemical, petrochemical, oil refining, chlor-alkali, phytic acid, phosphate fertilizer, pharmaceutical, pesticide, chemical fiber, dyeing, coking, gas, organic synthesis, non-ferrous metallurgy, steel, atomic energy and polymer filtration materials, high-purity product production (such as ion membrane electrolysis), viscous material transportation and operation, food and beverage processing and production departments with highly stringent hygiene requirements.

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Product Description

Application

1. Good wear resistance

Excellent wear resistance under high load.

2. Smaller torque

It has the lowest friction coefficient among solid materials (friction coefficient is between 0.05-0.15), and the operating torque is much smaller than that of ordinary valves.

3. Excellent chemical properties

Inert to most chemicals and solvents, resistant to strong acids, alkalis, water and various organic solvents. Resistant to corrosion by strong oxidants.

4. Non-adhesive

It has the smallest surface tension among solid materials and does not adhere to any substance.

5. Advanced pinless connection

Advanced pinless connection technology ensures complete isolation of the medium and metal, improves product reliability, and makes butterfly valve maintenance simple and easy, saving time and labor.

6. Full plastic spray surface

The surface of the product is fully sprayed with plastic, which not only has a beautiful appearance, but also has excellent external anti-corrosion performance.

7. Good temperature resistance

PTFE can work continuously at a high temperature of 260 degrees Celsius and will not become brittle at minus 180 degrees.

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Product Performance Specification

Nominal diameter	Nominal pressure	Applicable temperature	Applicable media	Connection Type	Conection 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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Packaging

Frequently Asked Questions (FAQ)

What media are suitable for this butterfly valve?

The valve is applicable to strong acids, strong alkalis, metal etchants, liquid oxygen, desulfurization liquids, sea water, drinking water, food, and various corrosive or high-purity media.

What is the working temperature range?

The general applicable temperature range is -30℃ to 150℃. The PTFE material can continuously operate at temperatures up to 260℃ and retains its integrity down to -180℃ without embrittlement.

What are the benefits of the pinless connection design?

The advanced pinless connection technology ensures total isolation between the process medium and the metal components. This enhances product reliability, prevents leakage, and facilitates easy, labor-saving maintenance.

Why does this valve require a smaller operating torque?

It utilizes solid materials with an exceptionally low friction coefficient (between 0.05 and 0.15), which significantly reduces the operating torque compared to standard valves and enables smoother control.

Which connection types and standards are supported?

Available connection styles include Wafer type (flangeless A type, U type, single flange type), Single clamp type (LT body), and double flange. It conforms to international standards including GB, DIN, BS, JIS, ASME, EN, ANSI, and ISO.

How is external corrosion resistance achieved?

The entire exterior surface of the product is fully sprayed with plastic, which delivers exceptional corrosion protection against harsh external environments and provides a clean aesthetic finish.