Manual/electric soft-sealing butterfly valve is suitable for pipe line with water, sea water or oil as medium. It is mainly used as stop valve to cut off medium to protect pipeline system.
Manual/electric soft-seal butterfly valve is mainly composed of butterfly valve body, manual device or electric device.
Soft sealing butterfly valve implementation standard
Design and manufacturing standard: GB/T 12238
Valve structure length standard: GB/T 12221
Connecting flange standard: GB/T9113.1, GB/T17241.6
Inspection and test standard: GB/T 13927
Soft seal butterfly valve working principle
The soft seal butterfly valve is decelerated through the worm gear rod (the electric valve is decelerated by the motor through the worm gear), and the disc is driven by the valve shaft to rotate within 90°, so that the disc is opened or closed so as to achieve the the goal of connection or cut-off medium.
Soft sealing butterfly valve structure features
The butterfly valve of soft seal is rubber soft seal, adopt double eccentricity structure, this structure can reduce the wear of sealing surface, reduce the moment of closing valve, improve the sealing surface service life;
The sealing pair is made of stainless steel to rubber, so the sealing performance is good. It is a two-way zero leakage valve, and the rubber sealing ring is interchangeable, easy and easy to replace.
The butterfly valve is compact in structure, quick in opening and closing, reliable in sealing performance (because the sealing surface friction is small in the process of opening and closing), portable, labor-saving, long life and convenient in maintenance.
Because the manual/electric soft-seal butterfly valve is a double-eccentric sealing structure, the disc seal ring is relaxed when the valve is fully open.When the valve is closed, the sealing ring is compressed by the sealing cover and disc plate of the valve body, resulting in elastic deformation. This elastic deformation is that the sealing force between the sealing surface of the valve gradually reaches the maximum value, and its characteristics are as follows:
1. Quick opening and closing of soft sealing butterfly valve;
2. The soft seal butterfly valve adopts advanced double-eccentric sealing structure, which has small friction and good sealing performance;
3, the soft seal butterfly valve seal ring and valve body with precision, effectively avoid media wash, improve service life and sealing effect;
4, soft seal butterfly valve disc plate seal material for high-quality rubber, sealing ring has a good anti-aging, wear resistance, long service life;
5, soft seal butterfly valve switch limit device is reliable, no over-opening, crossing phenomenon, switch indication and the actual position of the disc.
Electric device has over-torque device, counter travel control structure, local position indication and remote contact, there are two pairs of normally open and two pairs of normally closed contacts; there are full open contacts, to meet the requirements of local and remote control . The electric device can accept three-phase four-wire system 380/220VAC. The electric device can withstand 2 times the required torque without permanent deformation and damage; hand, electric switching mode is electric priority automatic operation mode.
6, soft seal butterfly valve body, disc, stem with sufficient strength and stiffness, after the disc seal installed in the body can be adjusted and replaced.