The hardness and pressure on the O type of hydrogenated butadiene acrylonitrile import
To choose how much of the hardness is to be in a positive relationship with the pressure. That is to say, the greater the pressure, O-ring hardness to the greater. Usually, the conventional hardness of nitrile rubber NBR, three EPDM EPDM, silica gel SIL was 70, while the conventional hardness of fluorine rubber was 75 FKM/VITON. We know that the O-ring relies on elastic deformation caused by the sealing force. Therefore, if the pressure is not the case, it is better to try to choose some of the relatively low hardness, because of the low hardness of the rebound is relatively good, the sealing property is better. In this way, can we make a hardness of 35 or less? Certainly not as good as. Because of the difficulty of processing the degree and cost of the problem. General hardness of the processing range of shore hardness 40~90 degrees. The corresponding pressure range is 0~35Mpa. If the pressure is big, will be used together with the retaining ring. The ring is divided into A type (type: incision and lateral incision into a 22 degree angle) and type B (closed) two. At present, with more and more are polytetrafluoroethylene (PTFE) ring, which belongs to the A type.
Two, import sealing ring
Commonsealing ring: O-ring, O-ring, rubber seal ring, X ring (star ring), ED (ring pipe joint sealing ring), rubber ball, L ring, V ring, YX ring, UHS ring, UN ring, DKB type dust ring rectangular sealing ring, DHS type dust ring, PTFE sealing ring, UPH ring, TC seal etc..
The sealing ring has the advantages of long service life, long service life, high pressure resistance, high temperature resistance and low temperature resistance, small friction force, chemical resistance and corrosion resistance, and is not easy to dissolve or expand in various media.
O 1/ type sealing ring: is the most widely used in all the sealing ring of a sealing element. Mainly used for static sealing and reciprocating seal.
Y 1/ type sealing ring: widely used in reciprocating dynamic sealing device.
V 2/ type sealing ring: is a kind of axial action of the elastic rubber sealing ring, used as a rotating shaft seal. The sealing lip has activity and good adaptability, can tolerance and compensation of angle deviation, can prevent the internal leakage of grease or oil solution is also can prevent the intrusion of external, splash or dust.
YX type sealing ring for 3/ hole: seal for piston of hydraulic cylinder for reciprocating motion. Material: polyurethane TPU, CPU, rubber. Working medium: hydraulic oil, emulsion. Operating temperature: TPU:- 40 ~ +80 C; CPU:-40 ~ +120.
Working pressure: 32Mpa; hardness: 85 degrees. TPU: general hydraulic cylinder, general equipment hydraulic cylinder. CPU: hydraulic cylinder and high temperature, high pressure cylinder used for construction machinery.
4/ moment type sealing ring: generally installed in the outer circle or inside the circular cross-section of the rectangular groove sealing effect.
Three, hydrogenated butyl cyanide imported O type ring specifications, specifications
O-ring/ O-ring specifications are expressed in two forms, the diameter of wire diameter (ID*C/S) and * * outer diameter of wire diameter (OD*C/S), which bore diameter is the most commonly used. Taiwan Asahi Meike seal (XOK), complete specifications, strong technical force. Like NBR butadiene rubber conventional sizes are basically in stock. In addition, EPDM, SIL, FKM/VITON, etc. there are a lot of cash.
O type circle of all kinds of thickness have done, such as C/S can be small to 0.3 mm, big to 20 mm; and inside diameter ID can be small to 0.6 mm, big to 2200mm. XOK commonly used specifications are as follows, but not limited to the following specifications, the specific needs of what specifications also please contact us for further confirmation.
Standard diameter * diameter (ID*C/S) size diameter * diameter (ID*C/S)
Specification 1 (1~100) *1 specification 16 (6~487) *3.55
Specification 2 (1~100) *1.5 specification 17 (5~605) *4
Specification 3 (1.8~90) *1.6 specification 18 (6~280) *4.5
Specification 4 (1.78~185.19) *1.78 specification 19 (5~570) *4.6
Specification 5 (1.8~200) *1.8 specification 20 (5~520) *5
Specification 6 (1.2~180) *1.9 specification 21 (15~450) *5.3
Specification 7 (1~230) *2 specification 22 (7~633.48) *5.33
Specification 8 (3.2~180) *2.4 specification 23 (28.6~638.6) *5.7
Specification 9 (260~100) *2.5 specification 24 (7~680) *6
Specification 10 (1.24~247.32) *2.62 specification 25 (37.47~658.88) *6.99
Specification 11 (4.7~250) *2.65 specification 26 (12~860) *7
Specification 12 (1~490) *3 specification 27 (123.2~534) *8.4
Specification 13 (4.8~343) *3.1 specification 28 (37~730) *8.6
Specification 14 (3~520) *3.5 specification 29 (15~730) *10
Specification 15 (1.52~456.06) *3.53 specification 30, etc.