A).ISO9001:2008 & CE approved . B).30 years sales experience C).Size diversity(DN32-3600mm) D).Leader of Rubber Joint.

Our rich experience and expertise in the industry , On the basis of Gongyi Changmao Supplying and Draining of Water Materials Comapny and Sino-SouthKorea Joint Venture Henan Changmao Yuanyi Valve Co.,Ltd , we specialize in the enquipment of supplyingand draing of water materials.Focus our business in the water supply industry and work closer with our partners and customers from around the world !

Gongyi City one of "Top hundred county" located between Zhengzhou and Luoyang, great convience of transportation depend on the Longhai Railway, 310 National Highway, . Great Poet Dufu's hometown, good to sightseeing of Luoyang peony, to the South is world known Kongfu birthplace Shaolin Temple, to the north is the Yellow River. complete infrastructure, advanced telecommunications, transport facilities, in fact, outstanding and excelelent place to invest.

Authorized by china petroleum and chemical corporation and the top 500 enterprise in Henan.It has a certificate"the enterprise reaching the standard of total quaity control"issued by China Agriculture Department.It has passed the certification of ISO 9001 :2008 international system of quality control.

Products reach nearly one hundred series, thousands of specifications, including five series of patent products. They are flexible rubber joints, reduced rubber joints, rubber elbows, fan coil joint, sewage check valve rubber, rubber filter, rubber compensator air flue compensator, flexible hanger, rubber shock pad, shock absorber, pipe damper, seal, gate valve,check valve, foot valve, filters, valves, pressure balance valve, valve, butterfly valve, pipe expansion joints, bellows, waterproof sleeve tube, power delivery Joint, limit expansion joints etc.

Registered trademark "Changmao" brand, selling products throughout 31 provinces, municipalities and autonomous regions, was used in many key prestigious projects, and exported to the U.S., Germany, Italy, Japan, Korea, Egypt, Spain, Vietnam and other countries, enjoying high popularity .

We do believe there will be promising fruitful cooperation between us ! Meanwhile ,to launch different kinds of economic and technology cooperation to advance improvement!

Company Profile 

dual ball high pressure rubber jointis also called shock absorber,pipe shock absorber,soft joint etc Consist of inner rubber,Jinlun reinforced rubber and loose metal flange,ith high pressure chracter, good elasticity, displacement volume, balance pipe error, absorb vibration, reduce noise, effective, and easy to install,Can be used in water and wastewater, recycled water, fire fighting, paper, pharmaceutical, petrochemical, shipping, pumps, compressors, fans and other piping systems, use of units such as power plants, water plants, mills, water companies, engineering and high construction,Common type used to transport -15-- 115 centigrade air, compressed air, water, sea water, oil, acid and alkali. Special type used to transport -30--250 centigrade over the medium or oil, strong alkali acid concentration, solid-state materials.

Material: NO. NAME Material 1 Inner and outer rubber NR,EPDM,NBR,SI 2 Key frame Nylon Core fabric 3 Pressurized ring Steel Wire Strand 4 Flange Q235,A3

Technology Condition: Size I II III Working Pressure MPa(Kgf/cm2) 1(10) 1.6(16) 2.5(25) Explosion Pressure MPa(Kgf/cm2) 3.0(30) 4.8(48) 5.5(55) Vacuum KPa(mmHg) 53.3(400) 86.7(650) 100(750) Tempreture -15~115special customer made could reach to -30--250 Media air ,compressed air,water,sea water,oil,acid,alkali etc.

Main Data:

DN		LengthL(mm)	Outer Diameter of flange D (mm)	Bolts numbern	bolt hold diameterd0 (mm)	central hold diameter D1	Axial displacement(mm)		Lateral displacement(mm)	Deflexion anglebr> (a1+a2)
mm	inch						extension	compression
40	11/2	150	140	4	19	105	10	20	20	30
50	2	150	155	4	19	120	10	20	20	30
65	21/2	150	175	4	19	140	10	20	20	30
80	3	150	185	8	19	150	10	20	20	30
100	4	200	210	8	19	175	15	30	25	30
125	5	200	250	8	23	210	15	30	25	30
150	6	200	280	8	23	240	15	30	25	30
200	8	200	330	12	23	290	20	40	30	30
250	10	200	400	12	25	355	20	40	30	30
300	12	200	445	16	25	400	20	40	30	30
350	14	225	490	16	25	445	20	40	30	30
400	16	225	560	16	27	510	20	40	30	30
450	18	260	620	20	27	565	25	45	30	30
500	20	260	675	20	27	620	25	45	30	30
600	24	260	795	24	33	730	25	45	30	30

NOTES : 1.DN40-600,PN=1--1.6MPa.2.DN40-200,PN=2.5MPa.  

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