Question 1

Which international standards do ZFA valves comply with?

Accepted Answer

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.

Question 2

What certifications does Tianjin Zhongfa Valve hold?

Accepted Answer

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.

Question 3

Does ZFA offer OEM butterfly valve manufacturing?

Accepted Answer

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.

Question 4

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

Accepted Answer

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.

Question 5

How quickly will ZFA respond to a technical enquiry?

Accepted Answer

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.