Butterfly Check Valve with Hydraulic Counter Weight.

Overview  

Three eccentric hard butterfly check valve is my company set a variety of advanced technology development and the development of a new generation of slow closing check valve. The valve is widely used in metallurgy, hydropower, thermal power, heat, petrochemical, water conservancy, municipal and other industries, the use of independent adjustable hydraulic damping slow closing system for working conditions, pipeline and media parameters of the valve hydraulic damping slow closing The device is adjusted to the best position, installed in the pump outlet and water supply and drainage lines to prevent the media back to prevent water hammer impact, can effectively protect the machine, pump and pipeline safety.

Features Benefits 

1. Set-back, cut-off and elimination of water hammer multiple functions in one valve. Reduce the cost of purchase valve, high economy.

2. Automatically closed after the first fast off quickly closed action; fast off without resistance, slow closed anhydrous hammer. To ensure system security, reliability and strong.

3. Hydraulic damping slow closing device is a stand-alone system, can be adjusted according to working conditions, without oil or power to control, no maintenance, environmental protection and energy saving, lower operating costs.

4. Heavy hammer balance mechanism is also adjustable to improve the ability of the valve to adapt to conditions.

5. Slow start the pump, Kai valve after the valve inlet pressure reaches a predetermined value, the valve was open, can reduce the Kai pump current to ensure that the electrical and electronic control system security. Stop the pump when the first fast off after the slow closure, effectively prevent water hammer.

6. The use of butterfly valve structure, with small size, light weight, small footprint, reduce construction costs.

7. Three-dimensional eccentric + large eccentric seal structure, to open the seal that is isolated, close contact with the seal, reducing seal wear and prolong service life.

8. Metal + graphite sandwich seals, progressive seal, tightly sealed, and has anti-sediment and pressure automatic compensation function. Easy to replace and adjust, the sealing effect is good, for a wide range.

9. The nature of the fire design, high security.

10. Set butterfly valve, check valve features in one, plus a unique hydraulic slow closing system, the performance significantly.

Principle

1.Open the valve

Start the pump, the valve before the media pressure increases to the set value, the media acting on the force of the valve plate will slowly open to full-open position, the set value and the size of the hammer arm.

When the valve is opened, the hydraulic oil in the cylinder flows through the check valve from the needle valve, avoiding the pressure of the cylinder, so that the valve can be opened flexibly. Valve slow closing device has a limit device to ensure that the valve plate will not open over.

2.shut down valveWhen the media pressure before the valve suddenly decreases, the valve plate in the media back and under the action of heavy hammer closed.

Valve closing process using two stages of buffer: 90 ° ~ 15 ° range, the hydraulic oil through the throttle hole through the needle valve, needle valve to adjust the fixed throttling, slow down the valve closing speed, this time the valve is fast closing process; In the 15 ° ~ 0 °, the hydraulic oil flow through the throttle valve, throttling throttle through the throttle to stepless adjustment, this time the valve is a slow off process, from the surface to slow closing effect.

3.adjust

Switch and slow closing time can be adjusted according to the scene, so that the valve is in the best working condition.

Adjust the hydraulic cylinder needle valve, you can adjust the valve opening and closing speed and time.
Adjust the throttle valve on the hydraulic cylinder, you can adjust the valve phase slow closing speed and time.

Model preparation

Implementation of standards

Performance specification

Installation The installation of the valve is only applicable to horizontal installation (arrow indicates the medium flow, and pressure check valve seal in the opposite direction)

The valve allows the correct installation of the schematic diagram

The valve does not allow the use of the wrong way to install the diagram (2)

The special installation of the valve, but the direction of the need to change the hammer (custom instructions).    

Installation diagram (3)

Product appearance

Connection dimensions HBH747H-10 / 16 / 25 / 40 / 150LB / 300LB / 600LB