Principle: 

Bodies and bonnets are high quality cast and afterwards precisely machined, directing the attention to prevent stress concentration. the bodies of carbon steel gate valves consist of a straight through port that guarantees minimal turbulence and resistance to flow. In both designs, bolted bonnet and pressure seal, the bodies consist of guide slots to accommodate the wedge during opening or closing of the valve. Bonnets are made either of one piece only- the yoke then being an integral part of it- or have two pieces, depending on the size of the carbon steel gate valve. this ensures the perfect alignment with the body what leads to an accurate opening and closing.

Features:

1. Seat face alloy hard Faced, ground and lapped to a mirror finish;

2. Flexible wedge with low center stem wedge contact, in solid CA15 (13Cr)or hard Faced with 13Cr, SS 316, Monel or alloy. Wedge is ground and lapped to a mirror finish and tightly guided to prevent dragging and seat damage. Alloy hard Faced CF8M wedge is also available;

3. Non-rotating stem with precision Acme threads and burnished finish. Double Acme for faster operation;

4. Body and bonnet joint accurately machined;

5. Body and bonnet castings are precision machined. One-piece bonnet up to NPS 12 (DN 300) for better alignment and fewer parts;

6. Optional Locking device or stem extension;

7. Optional Direct mounting to ISO 5211.

Product Range:

Body material: carbon steel, alloy steel

Nominal diameter:2"58"

Pressure range: Class1502500

End connection: RF, RTJ, BW

Working temperature:-29+560

Mode of operation: Hand wheel, Gear Box, Electric Actuator, Pneumatic Actuator, etc.

Brand	ZhengFeng
Valve Type	Carbon Steel Gate Valve
Valve Material	Cast steel, special alloy, etc
Valve Test	100% quantity tested before delivery
Valve Guarantee	18 months from the date of dispatch ex works, or 12 months from date of commodity installation.
Valve Painting	Customer request
Valve Package	Wooden case
MOQ	No requirement
Valve Certificate	API 6D/CE/ISO9001/ISO14001
Delivery Detail	Shipped in 4 or 6 weeks after payment
Port	SHANGHAI
Payment Terms	L/C, D/A, D/P, T/T
Certificate Offered	Packing List, CommerciaL Invoice, Test Reports and Material Certificates, Certificate of quality and quantity, Seller's Certificate of Guarantee