Hydraulic Control Butterfly Valve

Characteristics of Hydraulic

Control Butterfly Valve

Energy storage device more secure

Relying on its own weight storage or by two accumulators storage, can be automatically shut of the valve without extermal energy

Multi use more flexible

Reliable sealing. small fow resistance coefficient

The seal is more efficient

A high degree of automation, local, remote and linkage control

Control mode of higher

PLC intelligent control system, can realize the text, touch screen and other humanized operation

interface, can also adopt ordinary relay system .

More intelligent interface

The hydraulic system of small power motor, high work eficiency, good pressure maintaining performance, oil pump start-up timinterval length .

The higher working efficiency

There are obvious opening indication and mechanical spacing adjusting mechanism, a travel  switch device waterproof dustprooidesign, not exserted. stable performance . long service life

A londer life

According to a predetermined program and other pipeline equipment linkage operation

Automatic operation more perfect

Closed to achieve slow closing function, effectively eliminate water hammer, water pump and pipe network security protection

The protection function is more secure

Can replace the water pump outet valve and check valve, and the machine, electricity, liquid in a body, has the advantages of smaloccupation area

Working Principle of Hydraulic

Control Butterfly Valve

Opening

Upon  opening  hydraulic  control  butterfly  valve,  under  the  acting  force  of  hydraulic control station and lit cylinder, disc wil rotate by90'driven by it arm, weight dropper rod and valve shaft etc .  Meanwhile, the acting force of hydraulic control station and lift cylinderwil verically  lift the weight dropper through  lift arm and weight dropper rod, making the gravity of weight dropper into potential energto be used for valve closing.

Lock

Composed  of drive  cylinder,  mechanical  lock  shaft,  electromagnetic  lock  shaft  and electromagnet etc, the locking mechanism ofhydraulic control buterly valve is provided with  the  dual  function  of  mechanical  and  electromagnetic  lockup .  When  valve  is fulyopened, the acling force of drive cylinder drives the mechanical lock shaft into the locking  position for  primary  lockout .  and then theforce  of electromagnet  drives the electromagnetic  lock  shaft  for  fnal  lockout .  The  process  of  lockout  is  completely automatic withoutany letup under the help of a series of position switches The huge acting force  of weight  dropper  is  completely  endured  by  mechanicalock  shaft . The withdrawal of mechanical lock shaft is restricted by electromagnetic lock shaf, while the withdrawal of electro-magneticock shaft  is controled  by the force of electromagnet . Provided  that  electromagnet  is  elect rife d ,  both  electromagnetic  lock  shaft andmechanical lock shaft are under well control . No matter how long the valve is kept open and how weight the weight dropper is, theweight dropper(disc) wil not fall a tiny bit, thus to ensure disc always fully opened(state of minimum fuid resistance) . lt doesn't needextra oiling and pressure in the process .

Closing

Valve is closed by A: man-made closed; B: closed due to failure or power breakdown of pump or valve; C: closed due to breakdownof outside wire . No matter in which case, as soon as the electromagnet is disconnected to power, valve will be closed according to thepredetermined procedure . Upon the breakdown of electromagnet, electromagnetic force  will  disappear  immediately.  Electromagneticock  shaft  wil  be  unlocked  when electromaanetic force disappears . and the mechanical lock shaft will also be unlocked upon the lossof restriction of electromagnetic lock shaf Here the potential energy of weight dropper wll immediately close the disc driven by weightdropper rod, ift arm and valve shaft etc, by the procedures of quick closing, cushioning and slow closing. The whole process is donewithout any letup . in the process of closing of hydraulic control buterfy valve, the oil liquor in the lower cavity of lift cvlinder shal bedischarged. For reasons given above, the method to control and adiust the speed of oil discharging in lfing cylinder can efectivelycontrol the closing speed of valve . The closing process of hydraulic control valve goes through the three procedures of quick closing.cushioning and slow closing. Both the time and angle of quick and slow closing are adjustable .