Air & Hydraulic Rotary Joints ,Rotary Unions

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Air & Hydraulic Rotary Joints ,Rotary Unions 
Sizes:1/4" to 2-1/2". 
Equivalent to Deublin 55&57 series general purpose unions.

Air & Hydraulic Rotary Joints ,Rotary Unions ,Water Service Rotary Joints ,Rotary Unions ,Steam Rotary Joints ,Rotary Unions ,deublin unions

Precision Rotating Connections for Water, Steam, Air, Hydraulic, Vacuum, coolant and hot Oil Services

Rotary unions must accommodate a broad range of materials, viscosities, temperatures, pressures and speeds.


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Q:How do you explain the pipe joint?
Steel pipe marking should be DN, DN is nominal diameter, DN20 galvanized pipe does not mean that the outer diameter of the pipe is 20mm, the outer diameter of the steel pipe, but 26.8mm; DN15 galvanized pipe, the outer diameter is 21.3mm.
Q:What are the types of tubing and pipe couplings applicable to each occasion?
Pipe joint is detachable between the tubing and tubing, tubing and hydraulic components of the connection, it should satisfy the convenient assembly and disassembly, reliable connection, reliable sealing, small size, large capacity oil, small pressure loss, good processing etc.. According to connection tubing and pipe joints, pipe joints are welded, sleeve type, expanding type, press type form; pipe joints each form, according to the channel number and direction of joint points straight, rectangular, three other types; threaded connection and flange connection with the connection of the body. In addition, there are some special purpose pipe couplings.
Q:What's the hydraulic pipe joint material?
Selection of pipe joints, the minimum is equal to the entire hydraulic system working state of the maximum working pressure setting the maximum working pressure for each joint, not only to consider the pump outlet pressure, also consider starting pressure relief valve. Therefore, in the design of complex hydraulic pipeline, the actual pressure is best measured by field measurements. The system operating pressure has been fixed, so the maximum working pressure of each selected pipe joint shall be checked.The maximum working pressure of the pipe joint can be changed by different sealing methods or according to the change of temperature: similarly, if the pipe joint chooses the elastic seal, it will get higher working pressure than the rigid seal.International standard set 4 times insurance coefficient, the reason is the practice of design thinking, the error of pipe joint device and equipment operation process may appear, the working condition of the system stability, in order to guarantee the system not paralyzed when in operation, so the insurance coefficient of the nominal pressure of the high.
Q:Will that be all right? Then there's the PPR pipe joint on the right. Is that ok?
The theory of PPR hot melt connection is safe and reliable, more than a few joints do not affect the use, will not cause the day after Water Leakage, of course, the premise is the quality manual, technical standard master.
Q:Standard for fabrication of jacket type pipe couplings for card sleeve couplings
10 、 flared type combined bend three way pipe joint (GB/T 5634-2008)11, adjustable sleeve to end bending through the three way pipe joint (GB/T 3743-2008)12, sleeve type taper thread bending three way pipe joint (GB/T 3744-2008)13, card sleeve type three way pipe joint (GB/T 3745-2008)14, card sleeve type four way pipe joint (GB/T 3746-2008)15, clamp type welding pipe joint (GB/T 3747-2008)
Q:Hydraulic hose connector size 20As shown in Figure six, the angle is 71mm to the edge, 80mm to the diagonal, approximately 34mm higher
Two. Metric general threads1. metric screw thread with a capital M, tooth type angle 2 degrees =60 (alpha tooth type half angle);2. metric ordinary thread by pitch, coarse teeth, ordinary thread and fine teeth, two kinds of ordinary thread;2.1. coarse tooth ordinary thread mark generally does not indicate the pitch, such as M20 means coarse thread; fine tooth thread mark must indicate the pitch, such as M30 * 1.5 for fine tooth thread, in which pitch is 1.5.2.2. common thread is used for the connection and fastening between the mechanical parts, and the general thread connection is mainly made of coarse thread. The thread strength of the fine tooth thread is slightly higher than that of the same nominal diameter, and the self-locking performance is better.Mark 3. metric screw thread: M20-6H, M20 * 1.5LH-6g-40, where M represents a common thread metric, 20 nominal diameter thread is 20mm, 1.5 pitch, LH said, 6G 6H left, said thread precision grade, precision grade of internal thread uppercase, lowercase precision grade of said external thread, 40 screwing length.
Q:Apart from the air-conditioning, the high-pressure pipe is not tight enough. What shall I do?
The position of the station is wrong, the output is not working / the spanner angle is not right... The most simple, is to find a major wrench with a long handle and then force that, if the screw is not open, it may break pipe head, we should pay more attention to the....
Q:What does national standard joint jb/t6381.2-92 mean?
JB/T, 6381.2-92, cone welded, straight through tubular, threaded, pipe couplings, machinery, industry standards, have been repealed,
Q:PPR pipe joint leakage, do not want to change pipes, what is the good way?
You did not explain is not with threads, if you want to screw thread, cut threaded joint is broken, then a good joint,
Q:The pipe connections have different diameters. Reducing the diameter, what else?,
Six links, or even moreAccording to material classification, same material, different material

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