NEED HELP? YOU CAN TAKE A LOOK AT FAQ FIRST
Q Are you a Factory or Trading?
A We’re a factory with 17 years production experience, OEM for some customers around the world.
Q Can I request to change the form of packaging and transportation?
A Yes, We can change the form of the packaging and transportation according to your request, but you have to bear their own costs incurred during this period and the spreads.
Q Can I request fast delivery?
A Yes, if we have stocks.
Q Can I have my own Logo on the product?
A Yes, you can send us your logo drawing, we’ll put it on the valve.
Q Can you produce the valve according to my own drawings?
A Yes.
Q Do you accept custom design on size?
A Yes.
Q What's your terms of payment?
A T/T, L/C.
Q What is your transportation method?
A By sea, by air mainly, we also accept express delivery.
Q What are the design principles of your products?
A ZFA butterfly valves are designed to strike an optimal balance between sealing reliability and operating torque, minimizing torque while ensuring a secure seal.
The valve seat geometry is optimized to ensure uniform pressure distribution between the disc and the seat, thereby guaranteeing stable bi-directional sealing performance.
Precision machining of the disc edge reduces operating torque, while rounded corners minimize wear on the seat during opening and closing cycles.
For the replaceable seat design, the seat is securely fixed within the valve body, facilitating quick on-site replacement and significantly lowering maintenance costs. Specifically for the PN25 series, we have not only improved the seat design but also reinforced critical stress-bearing areas of the valve body to enhance pressure-bearing capacity and service life.
Additionally, we place great emphasis on material compatibility. From seat materials like EPDM, NBR, PTFE, and silicone to components made of stainless steel, duplex stainless steel, and ductile iron, every configuration is carefully selected to meet specific pressure, temperature, and corrosion resistance requirements.
Q Can your products feature the customer's logo?
A Certainly. We offer OEM services; please refer to https://zfavalves.com/blog/zfa-valve-oem-odm-process/ for details on the customization process.
Q Can your products be distinguished from those of other manufacturers?
A Yes, absolutely. The molds used for our products result in a visual appearance that differs significantly from most products on the market; even where there are superficial similarities, distinct details set our products apart.
Q What differentiates your products from those of competitors?
A *Compared to standard butterfly valves on the market, ZFA valves prioritize durability, sealing reliability, and application flexibility.
To cite the data: our in-house cycle tests consistently exceed 20,000 cycles.
Tests conducted by customers have reached 25,000 cycles.
*Regarding pressure resistance, while many soft-seated butterfly valves are limited to PN16 or PN20 ratings, ZFA valves can achieve a PN25 rating while maintaining reliable sealing performance.
*Material flexibility is another key advantage. We offer a wide range of material combinations for valve bodies, discs, stems, and seats, enabling customers to select the optimal configuration for their specific operating conditions.
In addition to standard materials like ductile iron, stainless steel, and WCB, we can provide customized body materials such as LCC, LCB, and titanium.
Seat materials include PTFE, EPDM, Viton, NBR, Hypalon, and silicone.
Disc materials include ductile iron (coated with Nylon, Nickel, PFA, PTFE, or EPDM), WCB, LCB/LCC, CF8/CF8M/CF3/CF3M, 2205/2507/95400/95500/95800, titanium, and others.
*Furthermore, every valve undergoes pressure and sealing tests before leaving the factory to ensure consistent and reliable quality.
Q How long does it take for your company to develop a mold?
A 10–15 days.
Q Do you charge a mold fee? How much is it? Is it refundable, and if so, how?
A Whether a fee is charged depends on the order value. However, please rest assured that even if a mold fee is charged, it can be deducted from the payment for goods once formal orders reach a certain threshold, or a percentage of the mold fee can be deducted from each individual order.
Q What certifications does your company hold?
A We hold certifications such as ISO9001, CE, and WRAS.
Q How do you maintain your molds on a daily basis?
A After each use:
*Clean the mold surface: remove metal chips/debris from body/disc molds, and clear rubber residue, dust, and oil stains from seat molds.
* Inspect for clear lettering/markings and check for overall wear, scoring, scratches, or corrosion spots; repair immediately if any issues are found.
* Spray anti-rust oil on molds that are not frequently used. For molds out of service for extended periods, thoroughly clean and oil them, wrap them in anti-rust paper, and store them in a dry environment away from direct sunlight.
Q What is your company's production process?
A https://www.zfavalve.com/soft-sealed-butterfly-valve-production-process-complete-guide/
Q What is your company's product lead time?
A The factory covers an area of approximately 10,000 square meters. In addition to office areas, the facility includes workshops for machining, assembly, coating, and storage.
We have a workforce of over 50 employees:
*Manage Department
General Manager: 1 (Responsible for strategic planning)
Deputy General Manager: 1 (Oversees company operations)
*Foreign Trade Department
Foreign Trade Sales Manager: 1 (Over 10 years of experience)
Foreign Trade Sales Representatives: 4 (3 fluent in English, 1 fluent in Russian)
Sales Assistant: 1 (Responsible for documentation, shipping arrangements, etc.)
SEO/Website Operations: 1
*Technical Department
Technical Manager: 1 (Over 20 years of experience; responsible for R&D and design)
Valve Design/Drafting Engineers: 2 (Responsible for technical drawings)
*Quality Control Department
Experienced Quality Supervisor: 1
Inspector (IQC/IPQC/FQC): 1 (Covers Incoming, In-Process, and Final Quality Control)
Pressure Testers: 2
*Purchasing Department
Purchasing Supervisor: 1
Purchasing Agent: 1
Planner: 1
*Production Workshop
Assemblers: 8
Packers: 2
Machining Team: 13
*Others
Finance: 1
Administration & HR: 1
Q What testing equipment does your company have?
A Material testing: Metallurgical microscope, spectrometer.
Dimensional inspection: Vernier calipers, micrometers, go/no-go gauges, etc.
Rubber testing: Shore durometer.
Pressure and sealing tests: Hydrostatic and pneumatic sealing test equipment.
Finished product testing: Torque testing, fatigue cycle testing.
Q What is your company's quality control process? IQC (Incoming Quality Control)
A *Raw materials: Inspection upon arrival of castings, rubber parts, and fasteners.
Material grade
Chemical composition
Dimensions
Surface defects
Spheroidization rate (for ductile iron parts)
*IPQC (In-Process Quality Control)
Machining dimension check
Valve stem concentricity check
Valve seat vulcanization quality check
Coating quality check
*Assembly Inspection
Component model/specifications
Assembly dimensions
Operating torque
Operational smoothness
*FQC (Final Quality Control)
Visual inspection
Dimension check
Body pressure test
Sealing test
Nameplate check
*OQC (Outgoing Quality Control)
Packaging check
Documentation check
Random sampling inspection
Q Do your products have traceability?
A Yes, every step of production for each batch is backed up by corresponding documents and images. We can trace component batches, inspection records, etc.
Q What are your company's QC standards?
A * Management System
ISO 9001 Quality Management System
* Product Standards
EN 593
ISO 5752
EN 558
* Pressure Testing Standards
API 598
ISO 5208
EN 12266-1
* Coating Standards
ISO 12944
* Internal Standards
100% inspection of critical dimensions
100% pressure testing for every valve
Traceable inspection records
Q What is the service life of your products?
A Service life is directly related to usage frequency and maintenance frequency, so it cannot be answered with a single, generalized figure.
Q What are the specific categories of your products?
A Product categories include butterfly valves, gate valves, and check valves.
*Butterfly valves:
By sealing material: Soft-seated and hard-seated butterfly valves.
By structure: Concentric, double-offset, and triple-offset butterfly valves.
By connection type: Wafer, lug, single-flange, double-flange, and grooved butterfly valves.
*Gate valves:
By sealing material: Soft-seated and hard-seated gate valves.
By structure: Rising stem and non-rising stem gate valves.
By connection type: Flanged, grooved, and socket-weld gate valves.
*Check valves:
By connection type: Wafer and flanged check valves.
By sealing material: Soft-seated and hard-seated check valves.
By structure: Swing type and axial flow type.
Q What payment methods does your company accept?
A Typically, a 30% down payment via T/T, with the balance paid upon presentation of photos (prior to shipment).
Q Does your company have its own brand?
A ZFA is our registered trademark.
Q To which countries and regions are your products currently exported?
A Our products have been exported to over 50 countries and regions across Asia, Europe, Africa, North America, South America, and Oceania. Key markets include the USA, Germany, France, Italy, Belarus, Russia, Hungary, the Netherlands, Spain, the Czech Republic, Canada, Mexico, Brazil, Chile, Saudi Arabia, the UAE, Thailand, South Korea, Malaysia, Indonesia, and Algeria.
Q Do your products offer a competitive price-performance ratio? What are the specific advantages? *Cost Advantages
A In-house manufacturing; no middlemen adding markups.
Economies of scale in procurement reduce raw material costs.
Valve bodies available in multiple standards to meet connection requirements across various countries.
*Quality Advantages
Raw materials compliant with international standards.
100% inspection prior to shipment.
*Service Advantages
Rapid response to customer needs.
OEM services supported.
Technical support for product selection.
Provision of drawings, inspection reports, etc.
Q Who are your company's domestic and international competitors? How do your strengths and weaknesses compare to theirs?
A International Competitors
Emerson
Bray
KSB
AVK
Flowserve
*Strengths
More competitive pricing.
Shorter lead times.
Strong customization capabilities.
Structure, materials, and markings can be adjusted to meet customer requirements.
High communication efficiency.
*Weaknesses
Relatively lower global brand recognition.
Limited overseas service network coverage.
Domestic Competitors
Neway Valve
Suzhou Valve (Suvalve)
*Strengths
Greater focus on butterfly valve products.
Stricter quality control.
More proactive customer response.
*Weaknesses
Product line is not as comprehensive as that of diversified valve conglomerates.
Limited number of ultra-large-scale project references.
Q What are your company's working hours?
A Standard working hours are 8:00 AM to 5:00 PM (China time); flexible working hours are from 5:00 PM to 10:00 PM. Customers may make inquiries during this flexible period as well. Outside of these times, sales staff are off-duty, but inquiries will be promptly addressed the following day.
Q How does your company handle after-sales service?
A *Quality Warranty Period
We provide quality warranty services for our products.
Warranty covers 18 months from the date of shipment;
Or 12 months from the date the product is put into operation (whichever comes first);
We are responsible for repair, replacement, or resupply in the event of quality issues caused by defects in product design, manufacturing, or materials during the warranty period.
*Technical Support Services
We provide free technical support services, including:
Product selection guidance;
Installation guidance;
Recommendations for use and maintenance;
Fault analysis and resolution;
Provision of technical documentation.
Technical support is available via email, telephone, video conferencing, etc.
Q What online communication tools does your company use?
A Email, WhatsApp, WeChat, LinkedIn, Facebook, VK, etc.
Q What are your company's complaint hotlines and email addresses?
A sales@zfavalve.com
Q What is your company's development history?
A 2006 Establishment
2010 ≥30 CNC Machines (Acquired over 30 CNC machines)
2023 WRAS & CE Certificates (Obtained WRAS and CE certifications)
2024 New Plant (Relocated to a new facility)
2025 Complete New Production Line
2026 Painting & Vulcanization Workshop
Q What internal office systems does your company use?
A Key office systems include:
*ERP System (Enterprise Resource Planning)
Order management
Purchasing management
Production planning
Inventory management
Shipment management
*CRM System (Customer Relationship Management)
Customer profiles
Quotation records
Project follow-up
After-sales service
*Production Management System
Production scheduling
Work order management
Production progress tracking
Production data statistics
*Quality Management System (QMS)
Incoming material inspection records
In-process inspection records
Finished product inspection records
Non-conforming product management
Quality traceability
*OA (Office Automation) System
Document approval
Leave approval
Internal notifications
Workflow management
Q How does your company protect customer data confidentiality?
A * Access Control System
Customer data is accessible only to authorized personnel:
Sales staff can only view information regarding their assigned customers;
Technical staff can only access technical documents related to specific projects;
Unauthorized personnel cannot access customer data.
* Non-Disclosure Agreement (NDA)
For projects involving proprietary designs, customized products, or special requirements, the company can sign an NDA with the client.
Additionally, the company has signed internal confidentiality agreements with relevant employees.
* Protection of Samples and Drawings
Customer-provided drawings, samples, and technical documents are:
Kept under the custody of designated personnel;
Not disclosed to third parties;
Not used for other projects without customer authorization.
* Supply Chain Confidentiality Management
For projects involving customized products, confidentiality agreements are signed with partner suppliers.