Hydraulic valve works

Hydraulic valve works
1) Industrial (also known as fixed equipment, which is relative to the walking mechanical terms) is generally 4-pass valve, that four main ports: pressure oil imports P, load ports A and B, leading to the tank back to the oil port T. The rest of the control port, load pressure LS port, drain port and so can not be calculated in a few pass inside.
2) Those who need the pilot to control the oil on the main stage of the elements, such as reusable hydraulic hose fittings, the pilot oil sources are present and how to deal with the issue back to the oil. This is the performance of hydraulic quick couplers technology flexibility, giving users stay out of the room according to the actual needs of the system for selection. Here:
X-- control oil inlet from the outside of the main system (called external control, if from P mouth, said internal)
Y-- control oil taken directly to tank port (called outside back (leaks), if returned to T port, said inner back (inside vent))
L-- valve leak within the oil tank alone brought back the oil port
3) Incidentally, processing pilot oil can be reasonably combined as required:
External control, outside back; external control, internal back; internal and external back; internal control, internal back.
4) Incidentally, for L mouth leaking oil, outside the pilot oil return, must lead directly back to the tank (or through the filter), should never be brought together to the main return oil tank T ports be brought back. This situation is even more sensitive in the ratio, the servo system.

in order to withhold machine permanent

Deduction of the machine , commonly called a crimping machine , crimping machine , is a method for crimping hydraulic hose fittings tube assembly of hydraulic equipment, which will be the metric hydraulic hose fittings supporting metal joint by crimping machine mold shrinkage force exerted by the hydraulic system, withhold solid metal joints on the supporting hydraulic tubing and rubber hose.
Tips
1 , the operating principle of dual hydraulic circuit , i.e., mouth and contraction of the piston forward and backward movement of the mold and the motive power of the hydraulic power source is generated . Not only does it move smoothly , return quickly , like a spring return , not open and lock the mold phenomenon does not occur. And all around the cylinder locking system design through easy to withhold various shaped elbow.
2 , the hydraulic system by the motor , pump , solenoid valve , relief valve and the hydraulic valve would move back and forth with a double hydraulic circuit , but also in a double hydraulic circuit of a rapid increase in drain oil from the valve passage , in order to achieve more Quick return purposes, and the speed is adjustable , noise and system pressure is reduced.
3 , the electrical control system, the control circuit applies PLC circuit , it is easy to repair circuits , easy maintenance and replacement simple.
4 , mold and die holder withhold cumulative error -free machining process to ensure that the withholding of withholding product evenly spaced lines , no size head phenomenon .
5 , in order to withhold machine permanent mechanical precision and life on the locking mechanism assembly , not only chose the high-quality steel materials, and the use of a unique heat treatment process. So crimping machine long life : the selection, heat treatment, machining process and the reasonableness of the structure are inseparable !
6, for double-column crimping machine , C -type crimping machine easy to set up because they do not die positioning, numerical methods must be used to control withhold size.
7 , withhold standard
Theoretical requirements : not from the head , does not destroy the rubber hose
In order not to take off the head - withhold efforts should be large , in order not to destroy the glue - withhold efforts to be small. To resolve this conflict without crimping machine to choose the first taper ( 0 taper ) pressure pipe machine so that both ends of the front and rear hydraulic metal joints consistent data to avoid errors. ( Note: If the front metal joints compressed intensity is too large , will be crushed if the metal connector joints backend compression intensity is too large , the rubber hose will fracture , causing the hose leakage , etc. ) .
How to withhold a satisfactory metric hose fittings hose
When the user when to withhold high-pressure pipe , if the withholding amount is too small , then the weight between the connector and the hose is too loose , the role of hydraulic hose withhold there may emerge from the joint in the initial period , if you withhold too large , then connector and hose too tight , easily lead to hose inner being localized damage, cracks , hydraulic oil directly into the steel layer from the rupture , and then he went along the gap between the wire coat tails oozing , or has been channeling along the wire layer to build up somewhere , so that the outer layer of plastic to produce drum kits and even rupture .
When withheld , nor withhold too fast, as is likely to cause damage to the rubber layer and wire breakage , so that the hose in use prematurely. Practical work , the replacement of the high-pressure hose, hose length selected , wire layers, joint shape and size to be reasonable , and should minimize the degree of bending of the hose , the majority of the damage is due to the high pressure hose making improper .
Works
Piston pump installed in the reusable hydraulic hose fittings  oil in the tank immersed in silent cooling design to achieve scientific purposes , the motor driven piston pumps , hydraulic oil output , push the plunger movement withhold tanks , resulting in mold base radial contraction , and mold squeeze on the hose fitting jacket . When the contraction reached micrometer predetermined value , squeezing automatically stop solenoid valve to change back , reverse movement of the plunger within the cylinder , die along with open, withhold hose complete.

Hydraulic Hose Fittings Three valves used correctly

Three valve is composed of three consisting of three valves communicate with each other. Each valve in the

system according to the role can be divided into: the left side of the high pressure valve, parher reusable hydraulic hose fittings the right for

the low-pressure valve, balance valve middle. The difference between the three valve Transmitter, a positive

effect, negative pressure measuring chamber and the lead point on or off; positive or negative pressure

measuring chamber is disconnected or turned on.
The main role: It is in the installation and removal of the need to use balancing valve Otherwise,

differential pressure range is generally small, if the manufacturers of overload is not strong, it is easy

to damage.
Here is a simple example: If the differential pressure is 60KPa, pipeline pressure 1MPa time, if there is no

balance valve, parher metric hydraulic hose fittings both first take positive or negative pressure chamber room, both sides would immediately lead

to a differential pressure far parher hydraulic couplers exceeds the set value because the first take that party will have a direct

and open to the atmosphere, the equivalent of 0.1MPa, this operation is fatal.