Beschreibung
150LB-18 inch American Standard Metal Hard Seal Butterfly Valve Lug WCB Worm Gear Butterfly Valve
( 1 ) Structural Introduction
Lug type butterfly valve, also known as branch ear type butterfly valve, American standard lug type butterfly valve adopts a three eccentric structure, and the valve seat is sealed with a metal multi-level hard sealing structure, usually a metal graphite interlayer, such as 304+graphite, 316+graphite. This hard seal can also be made into a single layer soft seal PTFE, RPTFE, PPL, EPDM, NBR and other three eccentric butterfly valves
1. Short structural size, small volume, light weight, and operational efficiency
2. Adopting a whole axis mechanism, the butterfly plate has high strength and a large overcurrent area
The unique three eccentric design reduces the friction loss of the seal, greatly extending its service life. Metal hard seals are resistant to high temperature, low temperature, and high pressure, and have a wide range of applications
(2) Relevant standards for American butterfly valves
Design and Manufacturing: API609
Structural length: API609
Anschlussflansch: ASME B16.5
Inspection and pressure testing: API598
Any valve produced by our company is strictly pressurized according to the pressure testing standards. Only after passing the pressure test can the zero leakage butterfly valve be allowed to leave the factory.
(3) Main component materials
Valve body: WCB
Butterfly plate: WCB
Valve stem: 410
Butterfly plate seal: SS304+graphite
Support: WCB
Worm gear box: QT450
The default bracket is WCB, and the material of the worm gear box is QT450 material. Our company can also produce materials such as WCB and CF8 according to customer needs
