The use of performance and service life

With the development of technology. The use of performance and service life of the valve valve put forward higher requirements. Currently, under the conditions when provided with a 120 mesh filter and a magnetic filter device, by using the test valve is opening and closing times of the total flow of the emulsion and the valve, to measure the life of the metric hydraulic hose fittings. But in fact the actual downhole indoor type test results of the work vary greatly. Many countries are now in the form of experiments, an increase of anti-pollution requirements, or the incorporation of appropriate pulverized in emulsion, some added mechanical impurities. To do this, you need to use the new, anti-pollution and strong, suitable for underground working conditions manifold seal pair.
Hydraulic support various hydraulic valve life is very low, foreign ways and means to solve is to improve the precision filtration system and improving the quality of the emulsion, but with little success. This paper analyzes the development process Sealing valve stent, discusses the relationship Sealing materials and sealing performance. Pointed out sealing technology is the key to the hydraulic valve hydraulic support life improved.

Metric hose fittings hydraulic fittings standard editing

First, assemble the bite type pipe fittings
       ① most important aspects of pre-bite type pipe joint, direct impact on the reliability of the seal. Generally require a dedicated pre-filter. Small diameter joints can be pre-installed on the vise. In practice, as a parent with a joint, nut, ferrule can be pressed hydraulic testing machine onto the pipe. There are card sets straight pipe joints, card sets Straight turned head, sleeve tee pipe fittings and other types. I found that even in the same factory shipment, these types of connector body tapered hole depth is often not identical result is a leak, and this issue is often overlooked. The correct approach is to end what kind of pipe metric hydraulic hose fittings joint body, connecting the ends of the corresponding pre-installed with the same type of connector, which can maximize avoid leakage problems. ② pipe end should be flush. After sawing the pipe should be ground flush on the wheel and other tools, and deburring, cleaning with high-pressure air blowing before use. ③ When preinstalled, you should try to keep the coaxial tube and connector body, if the skew is too large will cause the tube seal failure. ④ preloaded force should not be too much of the inner edge of the card is just embedded in the tube wall sets, card sets should not have significant deformation. During hydraulic fittings pipeline connection, then the provisions of the tightening force assembly. ф6-1 card sets tightening force is 64-1 15n, 16фmmr 259n, ф18mm for 450n. If, at the pre-card sets severe deformation, will lose seal.

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.