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.

CE Certification PTFE Lined Stainless Steel Butterfly Valve Manufacturer, Factory

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CE Certification PTFE Lined Stainless Steel Butterfly Valve Manufacturer, Factory

The PTFE lined stainless steel butterfly valve is a high-performance industrial fluid control component that perfectly combines robust mechanical strength and superior chemical resistance. It adopts premium stainless steel (SS304/SS316) as the valve body and disc material, providing excellent structural stability, pressure resistance and rust-proof performance for long-term service in harsh industrial environments. The full PTFE lining covers all internal wetted parts, forming an inert protective barrier against various corrosive media.

Featuring outstanding chemical inertness, the PTFE lining resists acids, alkalis, organic solvents and other aggressive substances across the full pH range, effectively preventing medium corrosion and valve contamination. This valve achieves bubble-tight zero leakage sealing, ensuring reliable fluid cutoff and regulation. It supports a wide temperature range from -30°C to 200°C and standard pressure grades of PN16 and ANSI 150LB.

With a compact wafer or lug-type structure, it enables easy installation, flexible operation and minimal maintenance. Widely applicable in chemical, pharmaceutical, food processing and environmental protection industries, it is an ideal solution for precise and safe control of corrosive and high-purity fluid systems.

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Product Description

Application & Overview

The PTFE lined stainless steel butterfly valve is a versatile, high-reliability fluid control device engineered for corrosive and high-purity industrial piping systems. It integrates durable stainless steel mechanical structure and inert PTFE lining technology, balancing structural robustness, precise flow regulation and extreme medium adaptability, which makes it a mainstream preferred valve in modern industrial fluid engineering.

In terms of technical specifications, this valve adopts high-grade SS304 or SS316 stainless steel for the valve body, disc and valve shaft, effectively avoiding rust, deformation and structural damage under long-term pressurized operation. It supports standard size ranges from DN50 to DN600, covering most industrial pipeline specifications. The pressure grades comply with PN10/PN16 and ANSI 150LB industrial standards, adapting to conventional and medium-pressure pipeline working conditions. The full virgin PTFE lining covers all wetted internal parts, featuring a full pH tolerance of 0–14. It maintains stable sealing and structural performance in a wide temperature range of -30°C to 200°C. Certified with ISO 9001, CE and relevant industrial testing standards, it achieves Class A bubble-tight zero leakage in line with EN 12266-1 specifications. Equipped with 90° rotary control modes including manual lever, gear, pneumatic and electric actuation, it supports flexible switch and proportional flow regulation.

This product boasts prominent comprehensive advantages compared with ordinary rubber-lined and cast iron valves. Firstly, the PTFE lining delivers exceptional chemical inertness, resisting strong acids, strong alkalis, organic solvents, oxidizing media and other corrosive substances, solving the common problems of lining aging, corrosion and medium contamination. Secondly, the stainless steel body provides superior mechanical strength and pressure resistance, ensuring stable operation in high-temperature, high-pressure and harsh outdoor environments with a greatly extended service life. In addition, the compact wafer and lug-type structure enables fast installation and convenient disassembly. Its split-body design allows internal maintenance and lining replacement without removing the valve from pipelines, reducing equipment downtime and maintenance costs by nearly 40%. Meanwhile, the smooth PTFE inner wall minimizes fluid friction and pressure loss, improving pipeline transmission efficiency and realizing energy-saving operation.

Driven by the rapid development of industrial upgrading and environmental protection industries, the market demand for PTFE lined stainless steel butterfly valves continues to grow steadily. It is widely applied in chemical processing, pharmaceutical manufacturing, food and beverage production, environmental wastewater treatment, new energy and metallurgical industries. In pharmaceutical and food industries, its non-toxic, hygienic and pollution-free properties meet high-purity fluid control standards. In chemical and environmental protection fields, it solves the pain point of corrosive medium pipeline control.

With the global stricter industrial safety and environmental protection standards, high-performance corrosion-resistant valves have become indispensable supporting equipment for industrial pipeline systems. Thanks to its cost-effectiveness, stable performance and wide applicability, this valve occupies an important market share in the industrial valve industry and has broad market development prospects.

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Frequently Asked Questions

What materials are utilized for this butterfly valve's body and internal lining?

The valve body, disc, and shaft are constructed from high-grade SS304 or SS316 stainless steel to eliminate rust and structural deformation, while all internal wetted parts are fully covered with virgin PTFE lining for high chemical inertness.

What are the standard size ranges and pressure ratings available?

The valve supports standard nominal diameters ranging from DN50 to DN600 and conforms to PN10, PN16, and ANSI 150LB industrial pressure standards, meeting the demands of most pipeline setups.

What temperature and chemical conditions can the PTFE lining withstand?

The full virgin PTFE lining features complete pH compatibility spanning 0 to 14, resisting strong acids, alkalis, and organic solvents. It operates dependably across temperatures ranging from -30°C to 200°C.

What sealing standard and certifications does the valve fulfill?

The valve is certified according to ISO 9001 and CE requirements, achieving Class A bubble-tight zero leakage in compliance with EN 12266-1 testing criteria.

How does the split-body structure reduce pipeline maintenance expenses?

The split-body configuration allows internal inspection and lining replacement without removing the valve body entirely from the pipeline, reducing equipment downtime and routine maintenance costs by nearly 40%.

What actuation and control methods are compatible with this valve?

It accommodates multiple 90° rotary actuation mechanisms, including manual lever handles, worm gears, pneumatic actuators, and electric actuators, enabling flexible shut-off and proportional flow modulation.