DN15 DN20 DN25 Q61f-150lb Q61f-300lb Russian Standard Carbon Steel DN20 Welded Valve Straight Through Type

• Customization: Available
• Media: Oil
• Material: Carbon Steel
• Model NO.: DN40-DN600
• Connection Form: Flange
• Driving Mode: Manual
• Nominal Pressure: PN1.0-32.0MPa
• Channel: Straight Through Type
• Structure: Fixed Ball Valve
• Type: Fixed Ball Valve
• Function: Blow-Down Valve, Relief Valve, Atmospheric Valve
• Temperature: Normal Temperature
• Standard: Q61f-150lb
• Application: Industrial Usage, Water Industrial Usage, Household Usage
• Transport Package: Carton Box+Plywood Case
• Specification: DN50-DN600
• Trademark: YAOFA
• Origin: China
• HS Code: 8481804090
• Production Capacity: 50000piece /Year

Product Description

factory profile 

Specification

Pressure Rating
Typically ranges from 1.6 to 6.4 MPa. Common ratings include PN1.6, PN2.5, and PN4.0 MPa.
Temperature Range
General operating temperature: -29°C to 200°C. Some special models can work within -60°C to 200°C.
Nominal Diameter (DN)
Common specifications: DN15, DN20, DN25, DN40, DN65, DN80, DN100, etc. Larger sizes can reach DN300 and above, selected according to actual needs.
Materials
Body: Generally made of carbon steel, such as ST37.0, A106 - B, 20# steel, etc.
Ball: Mostly stainless steel, such as 304 or 316 stainless steel.
Stem: Usually made of 2Cr13 chrome stainless steel or similar materials.
Seals:Ball seal: Commonly uses reinforced PTFE materials like RTFE (PTFE + C).
Stem seal: Can use perfluoroelastomer (FFKM), etc.
Connection Type
Mainly welded connection, including butt welding

After Sales Service

Standard Warranty: 12 months or 2,000 operating hours (whichever comes first).
Global Support: 24/7 technical assistance and spare parts supply.
Training: On-site or remote operation/maintenance training.

FAQ

Q: What’s the lead time for orders?
A: Standard models ship in 15–30 days; customized units require 30–45 days.

Q: Do you provide after-sales service overseas?
A: Yes, we have partnered service centers in key regions.

Q: Can I request a customized bucket size?
A: Absolutely! We offer tailored attachments.

Q: What documents do you provide for export?
A: Full export package (Commercial Invoice, Packing List, Bill of Lading, COC, etc.).

Q: How do I place an order?
A: Contact us via email/phone for a quote, then confirm with a PO.