Large diameter hydraulic control check butterfly valve

• This valve is an important equipment behind medium and large pipeline pumps. It is widely used in medium and large pipelines such as water conservancy and electric power. It can effectively avoid the impact of water hammer on pumps and pipelines.
• This butterfly valve product is a high-tech high-end butterfly valve product developed and applied at the end of the last century. It can precisely control and adjust the valve opening and closing time, and can accurately realize the fast and slow closing time.
• The valve can be divided into heavy hammer type and full hydraulic control type, as well as pressure holding type and locking type. It is an irreplaceable product for the backstop function of the pump.

Hydraulic control check butterfly valve

Application

The butterfly valve is suitable to be used at the exit of a pump and the medium is water. It is used to prevent or reduce adverse flow and excessively water hammer as both closing and checking equipment so as to protect the piping system.

Features

• The butterfly valves are opened by hydraulic and closed by potential energy of weight hammer. They can be opened by man-uall driven. The operation is agile and reliable.
• The valve is installed behind pumps, one of the valves can replace both a gate(butterfly)valve and a check valve with only 30% resistant coefficient of the sum of the two valves. So belong to products of energy economize.
• When the valve is closed, the quick closing from 90 to 30 and slow closing from 30 to 0″.Closing time can be regulated according to the working condition in order to prevent larger water hammer.
• HD741X has the performance of returning to original position. The oil pump can be reoperated to make the weight return to the original position when the valve opening reduces by 15.
• HD7S41X valve also has the following features:
  1)When the valve reaches the specified position, the weight arm is locked by locking pin to prevent the weight from falling back in some reason and closing the valve. When needed. so as to ensure the pin can be pulled out and the valve closed at any time.
  2)The valve is equipped with pressure compensated system of pressure relay to ensure the necessary pressure of hydraulic system.
• HD7BT41X type also has the following features:
  1) Has the performance of pressure-retaining: the hydraulic system pressure compensating can be automatic.
  2)After the valve opened, if atrace of leakage occurs in the hydraulic system then the storage releases energy to compensate pressure. When the pressure drops to a certain value, the relay gives order to compensate pressure. In order to prevent the relay from ineffecting. there is a positioning device for the travel switch in a word.
• In order to suit the Yellow River which has mud sand mediums etc. The end of the valve shaft has to prevent the mud and sand constructure it can prevent the mud and sand from entering. Ensure the opening and closing is flexible.

Type explain by examples

Basic hydraulic control principle diagram

Performance specifications and main parts materials

Main outform dimensions and masses

Main outform dimensions and masses (locking type)

Main outform dimensions and masses (pressure-retaining)

Whole-hydraulic control check butterfly valve

Application

The butterfly valve is suitable to be used at the exit of a pump and the medium is water. It is used to prevent or reduce adverse flow and excessively water hammer as both closing and checking equipment so as to protect the piping system.

Features

• The operating part of this valve adopts a whole-hydraulic ope-rated type and canceled heavy hammer, So as to reduce energy consumption simplifies the transmission mechanism. The occupying space is smaller it is as same as general butterfly valve. Installation-s convenient not only can be left-right horizontal but also vertical installation.
• The lower part of this valve adopts a double eccentric type. So it has reliable sealing. Friction loss of seal surface and friction torque can be reduced and service life of valves longer during the valve is closed the disk can be used to help close.
• While the valve is being closed. closing time may be freely regulated according to features of piping system or requirement of user so this can eliminate.
• In order to suit the Yellow River which has mud sand mediums etc. The and of the valve shaft has prevented the mud and sand constructure it can prevent the mud and sand from entering Ensure the opening and Closing is flexible.

Type explain by examples

Performance specifications and main parts materials

Main outform dimensions and masses