Which international standards do ZFA valves comply with?

ZFA valves are designed and manufactured in compliance with international valve standards including ASTM, ANSI, ISO, BS, DIN, GOST, JIS and KS, so they can be specified directly into projects in North America, Europe, Russia/CIS and Asia.

What certifications does Tianjin Zhongfa Valve hold?

Tianjin Zhongfa Valve Co., Ltd. operates an ISO 9001 certified quality management system and holds CE certification. Certificate copies can be provided with your catalog request or project documentation.

Does ZFA offer OEM butterfly valve manufacturing?

Yes. ZFA supports OEM projects from drawing review and material selection through casting, machining, assembly, pressure testing, branded marking and export packing, as well as supplying butterfly valve parts such as bodies, discs, stems and seats.

How do I choose between EPDM, NBR and PTFE butterfly valve seats?

EPDM is generally chosen for water, wastewater and HVAC service; NBR for oils, fuels and hydrocarbons; PTFE for aggressive chemicals and hygienic applications. Final selection should be confirmed against the media, temperature and pressure rating of the specific valve.

How quickly will ZFA respond to a technical enquiry?

Our sales engineering team replies to email enquiries sent to sales@zfavalve.com within 24 hours, with technical data sheets and catalog information for the valves you specify.

OEM NBR Seat Flange Butterfly Valve Factory, Exporters

1 / 5

OEM NBR Seat Flange Butterfly Valve Factory, Exporters

NBR has good oil resistance, usually if the medium is oil, we will preferably choose NBR material as the seat of the butterfly valve, of course, his medium temperature should be controlled between -30℃~100℃, and the pressure should not be higher than PN25.

Send Inquiry

Product Description

✔ Our valve has standard thickness according to GB26640, makes it capable of holding high pressure when needed.

✔ The valve body use GGG50 material, has higher mechanical property, rate of spheroidization more than 4 class, makes the ductility of the material more than 10 percent. Compared to regular cast iron, it can suffer higher pressure.

✔ The valve seat with 3 bushing and 3 O ring, helps supporting the stem and guarantee the sealing.

✔ Each valve should be cleaned by ultra-sonic cleaning machine, in case of contaminant left inside, guarantee the cleaning of the valve, in case of pollution to the pipeline.

✔ Bolts and nuts use ss304 material, with higher rust protection capability.

✔ Handle of the valve use ductile iron, is anti-corrosion than regular handle. Spring and pin use ss304 material. Handle part use semicircle structure, with good touch feeling.

✔ Non-pin stem design adopts anti-blowout structure, the valve stem adopt double jump ring, not only can compensate the error in installation, but also can stop the stem being blow off.

✔ Each product of ZFA has material report for the main parts of the valve.

✔ ZFA Valve body use solid valve body, so the weight is higher than regular type.

✔ Pneumatic actuators adopt double piston structure, with high precision and effective, and stable output torque.

✔ Body Test: The valve body test use 1.5 times pressure than standard pressure. The test should be done after installation, the valve disc is half close, called body pressure test. The valve seat uses 1.1 times pressure than standard pressure.

✔ Special Test: According to customer’s requirement, we can do any test you need.

Specifications & Standards

Size & Pressure Rating & Standard
Size	DN40-DN4000
Pressure Rating	PN10, PN16, CL150, JIS 5K, JIS 10K
Face to Face STD	API609, BS5155, DIN3202, ISO5752
Connection STD	PN6, PN10, PN16, PN25, 150LB, JIS5K, 10K, 16K, GOST33259
Upper Flange STD	ISO 5211
Material
Body	Cast Iron(GG25), Ductile Iron(GGG40/50), Carbon Steel(WCB A216), Stainless Steel(SS304/SS316/SS304L/SS316L) , Duplex Stainless Steel(2507/1.4529), Bronze, Aluminium Alloy.
Disc	DI+Ni, Carbon Steel(WCB A216), Stainless Steel(SS304/SS316/SS304L/SS316L) , Duplex Stainless Steel(2507/1.4529), Bronze, DI/WCB/SS coated with Epoxy Painting/Nylon/EPDM/NBR/PTFE/PFA
Stem/Shaft	SS416, SS431, SS304, SS316, Duplex Stainless Steel, Monel
Seat	NBR, EPDM/REPDM, PTFE/RPTFE, Viton, Neoprene, Hypalon, Silicon, PFA
Bushing	PTFE, Bronze
O Ring	NBR, EPDM, FKM
Actuator	Hand Lever, Gear Box, Electric Actuator, Pneumatic Actuator

Product Gallery

Our valves are compliance with valve international standard of ASTM, ANSI, ISO, BS, DIN, GOST, JIS, KS and so on. Size DN40-DN1200, nominal pressure: 0.1Mpa~2.0Mpa, suitable temperature:-30℃ to 200℃. The products are suitable for non-corrosive and corrosive gas, fluid, semi-fluid, solid, powder and other medium in HVAC, fire control, water conservancy project, water supply and drainage in urban, electric powder, petroleum, chemical industry, and so on.

Price Advantage: Our price is competitive because we process valve parts by ourselves.

We think “Customer satisfaction is our ultimate goal.” Depending on our advanced technology, complete quality control and good reputation, we will offer more high-quality valve products.

Frequently Asked Questions (FAQ)

❓ What international standards do these valves comply with?

Our valves comply with major international standards including ASTM, ANSI, ISO, BS, DIN, GOST, JIS, KS, and adhere to standard thickness specifications according to GB26640.

❓ What are the pressure test procedures for the valves?

The valve body test is conducted at 1.5 times the standard pressure with the disc half-closed after installation. The valve seat is tested at 1.1 times the standard pressure. Special customized tests are also available upon request.

❓ How does the stem design ensure safety and prevent blowout?

The valve features a non-pin stem anti-blowout structure with double jump rings, which compensates for installation errors and prevents the stem from blowing out under pressure.

❓ What media and industries are these valves suitable for?

They operate within -30℃ to 200℃ for corrosive and non-corrosive gases, fluids, semi-fluids, solids, and powders across HVAC, municipal water, fire protection, power, petroleum, and chemical industries.

❓ What makes ZFA valves competitively priced?

Our prices are highly competitive because we process and manufacture valve parts independently in-house while maintaining strict quality control and providing complete material reports.

OEM NBR Seat Flange Butterfly Valve Factory, Exporters

Product Description

Related Products

China Ductile Iron Body Worm Gear Flange Type Butterfly Valve Manufacturers, Exporters

OEM Electric Actuator Flange Type Butterfly Valves Manufacturer, Factories

China Large Diameter Electric Flange Butterfly Valves Factories, Exporters

China DI SS304 PN10/16 CL150 Double Flange Butterfly Valve Factories, Exporters

China DN1200 Flange Butterfly Valve with Supporting Legs Factories, Exporters

OEM NBR Seat Flange Butterfly Valve Factory, Exporters

China PN16 CL150 Pressure Flange Type Butterfly Valves Manufacturers, Exporters

OEM PTFE Seat Flange Type Butterfly Valve Manufacturers, Factory

China Electric Rubber Full Lined Flange Type Butterfly Valve Manufacturer, Factory

China U Section Flange Butterfly Valve Manufacturer, Factories