ZECO 96 inch butterfly valve can choose double eccentric structure or triple eccentric structure, double eccentric can use soft sealing structure or hard sealing structure, triple eccentric structure can use one-way sealing structure and two-way sealing structure. Large diameter butterfly valve may not be immediately installed in the pipeline, so especially pay attention to the valve before installation and maintenance. Medium touching pars and stem are the key party of a valve, following measures are adopted.
(a) The internal side of valve shall be cleaned with no dregs and stains to keep cleanness and dryness of a valve.
(b) Valve closure parts shall be in the state of closing. If the valve should be lifting, be cautious when lifting, throwing or falling down is utter forbidden, especially hand-wheel and stem shall not be the lifting point. ZECO, as the manufacturer of super-large size butterfly valve, devotes itself to researching and designing the problems that may occur in the production or even the delivery to the users when they store the products, and then gives corresponding advance plans to prevent the possible occurrence.
1. ZECO 96 inch butterfly valve can be chosen double offset rubber seat. NBR seat are sulfured into the framework increasing the sealing performance. The disc surface is designed into sphere type to reducing contacting area and frictional force;
2. ZECO 96 inch butterfly valve can be chosen double offset PTFE seat. A surplus between PTFE seat and disc ensures the seal in low pressure;
3. ZECO 96 inch butterfly valve can be chosen triple offset metal seat;
4. ZECO 96 inch butterfly valve can be chosen double offset metal seat.
No | Part | Material |
1 | Body | ASTM A216 WCB + 13Cr |
2 | Seal Ring | Graphite + SS304 |
3 | Retainer Flange | ASTM A105 |
4 | Pin | ASTM A276 410 |
5 | Disc | ASTM A216 WCB |
6 | Stem | ASTM A276 410 |
7 | Stem Packing | Graphite |
8 | Stem Beating | SS304 + PTFE |
9 | Bolt | ASTM A193 B7 |
10 | Nut | ASTM A194 2H |
11 | Yoke | ASTM A216 WCB |