SAE 100 R7/EN856 R7 DN25

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DNHose I.DHose O.DWorking PressureBurst PressureMinimum Bend RadiusWeightLength
inchmmmmMPaPsiMPaPsimmkg/mmetres
31/83.38.517.2250068.910000130.03720~100
53/164.810.820.7300082.712000200.06820~100
61/46.413.020.7300082.712000330.08520~100
85/167.915.117.2250068.910000460.10320~100
103/89.517.015.5225062.19000510.14120~100
131/212.720.713.8200055.28000760.21020~100
193/419.027.18.6125034.550001270.28720~100
25125.4346.9100027.640002030.54220~100

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Q:Do you know the inner diameter of the hose for household shower hose is the same? Can different brands of shower and hose mix?
Yes, it's easy to have this problem with sprinkler tubes. Because the hose and shower head inside and outside the effective length of the difference between the thread is too large, resulting in gaskets did not play a role in sealing, multi pad 1-2 pads can be, the gasket can be purchased at the hardware store to buy
Q:What are the types of metal hose couplings?
DGJ jointStructure and characteristics:DGJ self fixing metal hose joint, it can connect non threaded steel pipe or screw free equipment outlet and hose, and save the thread setting process;The metal joint is made of zinc alloy. The surface is zinc plated, sanded or chrome plated. The structure is compact and the strength is high. The steel pipe and the metal hose are connected reliably, and the appearance is beautiful;The metal joint is self - fixing and is used to connect the metal hose to the non - threaded steel pipe or the screw - free equipment outlet;Suitable metal hose: JS, JSH, JSB, JSHG;Adaptation: steel thin steel wire pipe, black, tin pipe (water, gas);When choosing the DGJ self fixing metal hose joint, please pay attention to the specification and size of the connecting pipe hose.
Q:Must the hose for the cooker be made of oil resistant rubber hoses?
Yes, the rubber hose link range is required for oil resistance, because of the smoke in the kitchen, a long time will be attached to the rubber pipe, if it is not oil resistant hose is vulnerable to corrosion, resulting in a safety hazard.
Q:Rubber tube in the production process need to wrap cloth, in order to finalize the design, I want to know what cloth is winding cloth, what is the specification, please god!
Widely used in rubber, special rubber, high pressure steel tube; the standard for mud suction hose, hose, hose winding wire; suitable for thick rubber rollers, rubber fender and some rubber expansion force; and the roller for thick water cloth curing wire reinforcement can not reach the the required hardness.
Q:What is the maximum pressure that a hose can bear?
Of course, there is a super high-pressure hydraulic hose, the working pressure of up to 80MP., using 6 layers of steel wire or more winding process.
Q:How can we prevent the aging of rubber tubes?
The second is the design of the structure of the rubber products (especially damping products), has a great relationship between aging and fatigue, should avoid stress concentration! If the product is good has been produced to prevent aging, more trouble! Can be sprayed on the rubber surface, spraying insulation polymer.
Q:Can the natural gas hose not exceed 1.5 meters or 2 meters?
The gas hose on the principle of not more than 1.2 meters, and regularly check the technical requirements, 1-2 must be replaced if the temporary gas can also be longer, if long-term use, as far as possible the use of metal pipe joint and the gas stove can also use metal hose, high safety factor.
Q:Is the electric water heater well connected with the metal hose?
The electric water heater, now in the industry are required to use PPR on the inlet and outlet pipe welding, a long service life, can effectively control the water heater outlet Water Leakage; on the other hand, can avoid the water heater power switch for two grounding and frequent take-off effectively. Therefore, the metal pipe connection does not meet the safety and installation specifications
Q:How can the rubber tube be used properly and how to use it properly?
Hose selection and installation caused by improper hose rupture. When replacing the hose, the hose wire length, number, shape and size of the joint should be reasonable, and should try to reduce the degree of bending in the hose; tighten union nut, do not make the hose distorted, excessive bending and twisting will reduce the service life of the hose greatly; some easily friction parts should take protective measures to prevent the hose due to wear and burst.
Q:How often do the oil - resistant rubber pipes undergo atmospheric pressure testing?
Bending test: after bending the hose to a certain extent, measure the minimum outside diameter of the bending part and the ratio of the outside diameter before bending, the passing capacity of the steel ball and the bending force when the tube is pressurized.

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