We insist over the principle of improvement of ‘High good quality, Effectiveness, Sincerity and Down-to-earth working approach’ to deliver you with excellent company of processing for Good User Reputation for DN350 ANSI 150 Lb Ductile Iron Resilient EPDM NBR PTFE Seal Wafer Lug Type Butterfly Valve Valvula with Handles Worm Gear Bareshaft, Winning customers’ trust will be the gold key to our accomplishment! Should you be fascinated in our merchandise, you should experience cost-free to go to our web site or contact us.
We insist over the principle of improvement of ‘High good quality, Effectiveness, Sincerity and Down-to-earth working approach’ to deliver you with excellent company of processing for China Butterfly Valve and Valve, Welcome any of your inquiries and concerns for our goods. We look forward to establishing a long-term business relationship with you in the near future. Contact us today. We’re the first business partner for yourself!
Usually there are trapezoidal threads on the lifting rod. Through the nut at the top of the valve and the guide groove on the valve body, the rotary motion is changed into linear motion, that is to say, the operating torque is changed into the operating thrust. When opening the valve, when the gate lifting height is equal to 1:1 times the valve diameter, the flow passage is completely open, but when running, this position can not be monitored. In practical use, the vertex of the valve stem is used as the sign, that is, the position of the valve stem that is not moving is used as its full open position. In order to consider the locking phenomenon of temperature change, the valve is usually opened to the vertex position and reversed to 1/2-1 turn as the position of the fully open valve. Therefore, the full open position of the valve is determined by the position of the gate (i.e. stroke).
Product characteristics:
1. Flat-bottomed seat, no accumulation of dirt, make the seal more reliable.
2. The valve disc is encapsulated with NBR as a whole. The inner parts of the valve are made of corrosion-resistant stainless steel and copper alloy, which can be used for sewage system to adapt to harsh working conditions.
3. Small size, light weight, easy to install and maintain
4. The valve stem is sealed with three O-rings, which greatly reduces the friction resistance of the switch and makes the switch light and water-tight.
Major Component Materials
name |
Texture of material |
valve body |
Ductile iron |
Valve plate |
Ethylene propylene rubber |
Nut |
brass |
Bolt |
SS201 |
Bonnet |
Ductile iron |
Opposite open loop |
brass |
Type O circle |
Ethylene propylene rubber |
Stem |