Wall Coupling

The coupling can be used to connect the pipe below or above ground level by observing the following technical specifications. By using the water coupling system, there will be no need for threading , bevelling, welding or flanging the  pipe end  and the problems caused by the contraction and longitudinal expansion in the pipes on this fitting  will be eliminated

This type of coupling is used to pass the pipe through the walls. Using the wall coupling system, in addition to the direct passage of the pipe through the wall, a connection can be made to both ends of the coupling. using this coupling not only reduces the cost but also the corrosion of  water pipes.

Product Features:

• No necessity for special tools and facilities for installation.
• Can be installed in any weather conditions and in narrow trenches.
• No need for bonding, welding, conic and threading pipes.
• Quick and easy installation and assembly.
• Suitable for all types of PVC, GRP, DUCTILE, STEEL pipes.
• No need to specify the exact position for installation.
• There will be no need to any bends(elbow) when using this coupling along a curved path • Compensation the effects of temperature changes with linear motion.
• Reducing the need for Joints
• Insulated against sound and vibration for the distance between the coupling and the pipe as well as the sealing rubber .                                                                                         
• Can be used to transmit water, gas, oil, petrochemicals, sewage and …
• Can be used for pipes from 50 mm to 5000 mm in diameter.
• Capable to move or rotate in a section of the pipeline.
• Allowed tolerance of 11 mm (+5, -6 mm) for the outer diameter of the pipes.
• Angular flexibility according to the table below in accordance with AWWA C219 standard

Corrosion Protection:

Electrostatic Epoxy Powder Coating with min 250 µm thickness, certified by reputable international institutions for potable water.

اثر دما بر روی کوپلینگ:

عملکرد دمایی کوپلینگ به نوع واشر لاستیکی (واشرآب بندی) به کار رفته درآن بستگی دارد و تا دمای 100 درجه سانتیگراد به کاربرده می شود. کوپلینگ در دمای نسبتاً ثابت با حداکثر کارایی خود عمل می کند. در صورتی که اغتشاش گرمایی به وجود آید لازم است که پیچ های کوپلینگ مجدداً تنظیم گردد. بنابراین کوپلینگ در مکان هایی نظیر حرارت مرکزی با تغییرات دمایی بالا قابل استفاده نمی باشد.

Chemical resistance:

The chemical resistance of the coupling is determined by the strength of the metal surface and the rubber material and the inner surface of the coupling.

Pipe Coating:

Some pipes are covered  with a coating layer for protection, which increases the outer the pipe, in which case the coupling can also be used thus it is necessary to chip a thin layer of the protective coating, The pipes should then be re-painted and ready to be installed for cathodic and corrosion protection  .It should be noted that the protective layer must be  removed  only a short distance from the pipe ends and if protective wires are used for cathodic protection of pipes, Nahrabab Gostar Eshtehard Company is able to provide  suitable couplings in proportion to  pipes shapes. Therefore, we must be aware of the final diameter of the pipes, i.e.   the outer diameter of the pipe plus the thickness of the coating or protective layer.

Stress Reduction in System.

• Rubber gaskets absorb sound and vibrations.
• The distance between two ends of the pipes can be used as a vibration absorber.
• Due to the above characteristics, different types of couplings can be used as vibrator absorber in pumping stations and along the pipe.

Use of couplings for GRP pipes:

Couplings can be used instead of manchone to connect GRP pipes. The advantages of coupling over manchone is as follows:

When repairing or disconnecting two connected pipes in GRP pipelines, the manchone must be broken, while the coupling can be easily opened and closed due to the bolting connection.

Resin (adhesive) and fiber welding methods are used to implement GRP pipelines, but the coupling connection is used both above and under ground .The angular flexibility of the coupling is greater than the angular deflection of the manchone end.

 Quick and easy installation and assembly.

• کاتالوگ کوپلینگ
• راهنمای نصب و نگهداری کوپلینگ

Technical drawings of this valve will be Uploaded soon