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The light-duty flexible couplings are the short-style couplings，which are mainly used for grooved pipe connections where adjacent pipe ends allow a certain amount of relative angular displacement and corresponding axial rotation.
The light-duty flexible couplings are suitable for medium and low pressure pipeline systems with nominal pressure 175-300 PSI, nominal size DN100-DN250, temperature range of – 20 ℃-+180℃, which are widely applied in water supply and drainage, fire-fighting, air conditioning, etc.
The light-duty flexible couplings are the short-style couplings，which are mainly used for grooved pipe connections where adjacent pipe ends allow a certain amount of relative angular displacement and corresponding axial rotation.
Dimensions:
4″(DN100)– 10″(DN250)
Design Standard:
ISO6182, AWWA C606, GB 5135.11
Connection Standard:
ASME B36.10, ASTM A53-A53M, ISO 4200
Working Pressure:
175-300 PSI
Application:
The light-duty flexible couplings are suitable for medium and low pressure pipeline systems with nominal pressure 175-300 PSI, nominal size DN100-DN250, temperature range of – 20 ℃-+180℃, which are widely applied in water supply and drainage, fire-fighting, air conditioning, etc.
Material of Pipe :
Welded and seamless rolled steel pipes according to ASME B36.10, ASTM A53-A53M, ISO 4200, GB/T 21835
Specification of Material
ASTM A536, Ductile iron according to 65-45-12. The nodularity is more than 90%, ensuring excellent physical and mechanical properties
Surface Treatment:
□Electrophoretic painting
□Spray molding
□Hot-dip galvanizing
□Bare metal（Black）
□Others would be available upon clients’ detailed request
2. SPECIFICATIONS
Housing:
ASTM A536, Ductile iron 65-45-12 Gasket:
1、EPDM Gasket，code E：
Temperature：-34℃～+110℃ （-30～+230℉）；
Applicable media: water, gas, diluted acid (base), and other chemicals (excluding hydrocarbons)
Note: Strictly prohibit the use of oil and hydrocarbons.
2、NBR，code D:
Temperature：-29℃～+82℃ （-20～+180℉）;
Applicable media: Petroleum products, vegetable oils, mineral oils, etc. Note: strictly prohibit use with high temperature substances.
3、Silicone Rubber, code S：
Temperature: -40℃～+177℃ （-40～+350℉）
Applicable media: High temperature and dry air and some high temperature chemicals, drinking water and so on.
4 、 Chloroprene Rubber，code LD： Temperature：-32℃～+82℃ （-26～+180℉） Applicable media: sea water
5 、 Fluororubber, code F： Temperature: -20℃～+180℃
Applicable media: Hot oil, some chemical products, good oxidation resistance. Bolts/Nuts:
ANSI Heavy Hex Nut
1.Material: SAE J995 2.
2.Thread: ANSI B 1.1-1982, class 2B.
3.Surface Treatment: Zinc electroplated per ASTM B633 CLASS FE/ZN5 TYPE Ⅲ , thickness ≥ 5μm per class SC1.
Metric Heavy Hex Nut
1. Material: ISO 898-2:1992 \ GB/T3098.2-2000 Class 8.
2.Thread: ISO 261, tolerance 6h for M10& M12, 7h for M16 and above.
3.Surface Treatment: Zinc Electroplated followed by a yellow chromate dip per ISO 2081 FE/ZN5, ISO4520 CLASS 1A.
ANSI Oval Neck Track Bolt
1.Material: SAE J429 5.
2.Thread: UNC thread per ANSI B 1.1 Class 2A.
3.Surface Treatment: Silver chromate electroplated per ASTM B633 CLASS FE/ZN5 TYPE Ⅲ, thickness ≥ 5μm per class SC1.
Metric Oval Neck Track Bolt
1. Material: ISO 898-1: 1992 \ GB/T3098.1-2000 Class 8.8.
2.Thread: ISO metric thread per ISO 261, tolerance 6h.
3.Surface Treatment: Yellow chromate electroplated per ISO 2081 FE/ZN5 ISO4520 CLASS 1A。
