V-ring series consist of three parts,which are seal ring, support ring and pressing ring. It is the seal used for piston rod of tank. Our factory
Qingdao J&K Co., Ltd is the subsidiary company of JINKUN Group, founded in 1989. JINKUN Group has been a comprehensive manufacturer in China. With construction area of 14000square meters and 300 skilled workers, our factory has a whole production line for rubber products, such as moulded and extrusion products. J&K has been one of the biggest rubber products supplier in the north of China. 
As the International Department, J&K exports rubber products to wordwide. Our president-Jack Chen, together with J&K team, is looking forward to the clients' arrival from all the world. We believe J&K will establish the long-term good business with you after discussions and cooperations.
Materials: 
1, Adopt PTFE, Or production according to the customer's requirements
2, Under the weather of below 100 centigrade,V-Ring adopt  NBR fabric-reinforced, support ring, pressing ring adopt NBR fabric-reinforced or Nylon; which can be in use 100-200 centigraqde; V-Ring adopt PTFE, FKM, pressing ring and support ring adopt PTFE.
 
 Advantages:
 1)It has very good elasticity and be enlongated easily
 2)It has strong adaptive load against axial  and radial viberation
 3)It can bear the high temperature and changeable pressure
 4)It is easily to be installed or uploaded
  
use standard
Pressure, 0-40 MPa; 
Temperature, -35-200 centigrade;
Speed, below 0.5 m/s;
Medium, hydraulic oil,emulsion and water.

Our service
Product drawings and pictures available for customer's catalog design. 
Response time within 24 hour
shipment quickly and in time
Technical support
FAQ
1.Q: As a new customer, I want to know the payment terms between us. 
Normally the following 2 terms of payment are acceptable: 
1) 30% deposit by T/T, and the balance on B/L copy.
2) For small order, 100% T/T in advance. 

Can you customize grip according to samples or drawing design? 
Yes.we have developed many complicated hoses for our cusotmers.
Can you put our company's logo on hose?
Yes. we can put your logo if you can provide us with copyright and letter of authority.
Can you customize our packing?
Yes. please let us have your packing design or packing idea.

Delivery time, shipment
INNER PACKING: 1piece/ one polybag:
OUTER PACKING: Dozens /cardboard box.
GROSS WEIGHT/OUTER CARTON: <30KG
OUTER CARTON SIZES AVAILABLE: ,55X47X30, 47X36X30, 38X38X38 (CM)
STANDARD SHIPPING MARKS: Front Marks and Side Marks on each outer carton or pallet, content includes Part Code, Part Name, QTY, Net Weight, Gross Weight, Carton Size, and Carton Number.
Rich experience in delivery arrangementto optimize the most economic and quickest shipping way
SEA,  AIR,  DHL, UPS ,FEDEX, TNT and etc.
LEAD TIME: 1 to 5 weeks depends on buyers' purchase order quantity.
DELIVERY WAY: By sea, air or courier agreed with buyers

Property of raw material:NR,NBR,SBR,CR,EPDM,SILICONE,FKM
(Natural Rubber) is made by latex from the rubber tree collection. Natural rubber is the polymers of isoprene. It has good abrasive resistance, high elasticity, tensile strength and elongation. Easy to aging in the air, become sticky when exposed to heat.It is easy to expand and dissolve in mineral oil or gasoline. It is able to bear alkali, but not strong acid.

Advantages:
1). good elasticity;
2). resistance to acid and alkali;

Disadvantages:
1). no weather resistance;
2). no oil resistance (but vegetable oil resistant);

Applications:
1). the raw materials of rubber belts, rubber hoses, rubber overshoes;
2). for the production of shock absorber parts;
3). used in the liquid with a hydroxyl automotive brake fluid, ethanol and other products;
(Nitrile Rubber) is made by the co-polymerization of acrylonitrile and butadiene, acrylonitrile content from 18% to 50%. Acrylonitrile content is higher, resistance to petrochemical oil hydrocarbon fuel the better, but the low temperature performance is poor, general operating temperature range is -25 ~ 100 ºC. NBR is one of the most commonly used rubber seals and O-rings.

Advantages:
1). good resistance to oil, water, solvent and high pressure oil properties;
2). good compression resistance;
3). good abrasion-resistant characteristic;
4). good elongation force;

Disadvantages:
  not suitable for polar solvents, such as ketones, ozone, nitro hydrocarbons, MEK and chloroform for the system.

Applications:
For the fuel tank, oil tank and hydraulic oil in the petroleum, gas, water, oil, lubricants and other flow-based diester medium for use in rubber parts, especially the sealing parts can be said is the most widely used and lowest cost rubber seals.
(Neoprene, Polychloroprene) is made by the polymerization of monomers from chlorine-butene. Rubber elastic resistance is good after vulcanization. It is not afraid of direct exposure to sunlight, particularly good weather resistance, not afraid of intense distorted, not afraid of refrigerating fluid, resistance to acid resistance, silicon ester lubricants, but the impatience of phosphate-based hydraulic oil. Easy to crystallize at low temperatures, hardening. Storage stability is poor at low aniline point mineral oil expansion volume. General temperature range of -50 ~ 150 ºC.

Advantages:
1). good elasticity character;
2). good compression character;
3). the recipe does not contain sulfur, so it is easy to make;
4). it resists to vegetable oils and animal oils;
5). neutral chemicals, fats, oils, various oils and solvents will not impact on physical  properties;
6). with flame-proof properties;
7). resistance R12 seals of refrigerating fluid;

Disadvantages:
not recommend to use of a strong acid, nitro hydrocarbons, esters, ketones, chloroform and chemicals into the system

Applications:
1). rubber parts or seals on appliances;
2).suitable for the production of direct touch with the atmosphere, sunlight, ozone components;
3). for a variety of fire resistant, chemical resistant rubber products;