The UPUA hole sealing ring is a main hole sealing ring made of polyurethane by turning molding process. This processing form has the characteristics of mold, speed, size and vitality, and can provide customers with the required products more quickly.
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The sealing ring for the UPR hole is the main seal for the plug hole made of NBR rubber. Because it is a one-way design, two backward-facing Settings are used when dual action is required. The low temperature type NBR rubber option is available for use in extremely cold areas. The friction resistance is small, which can reduce the crawling phenomenon in the compound movement. Static sealing effect is remarkable. The notch design on the back of the lip eliminates pressure accumulation between the sealing rings.
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A high specification hole seal made up of four separate parts when the main seal is used for the SPF hole. This design optimizes the mounting groove size of the piston. The special PTFE resin material can avoid the crawling problem of the sealing ring under the U-ring structure. The needle's compression resistance to SPS was insufficient, and special nylon rings were added on both sides of the resin to increase durability. The NBR rubber at the bottom is the force applicator, providing the support required for the sealing system and can be used at lower temperatures than the SPW.
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A high specification hole seal made up of 4 separate fittings when the SPW hole is used as a main seal. This design optimizes the mounting groove size of the piston. The special PTFE resin material can avoid the crawling problem of the sealing ring under the U-ring structure. The needle's compression resistance to SPS was insufficient, and special nylon rings were added on both sides of the resin to increase durability. The HNBR rubber at the bottom is the force agent, providing the support required for the sealing system.
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The main seal for the SPS hole is a piston hole seal ring made of special PTFE resin combined with NBR rubber. This design minimizes the size of the mounting trench. The special PTFE resin material can avoid the crawling problem of the sealing ring used in the hole of the U-ring formation. The problem of extrusion clearance between the groove wall of piston and the inner diameter of cylinder can also be solved. Because it is a separate seal, there is no pressure storage problem between the sealing rings. The O-ring at the bottom provides the required support. The chamfer of the top resin reduces extrusion, and the slope of the sides reduces through-through leakage.
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BRV is on the basis of BRK to add the side of the drain tank and through the pressure relief hole, can quickly establish the sealing pressure in the high pressure, but also solve the long stroke led by the back pressure accumulation, effective pressure release, increase the service life of the seal ring.
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The buffer ring for BRW rod is a combination ring made of special polyurethane rubber and special nylon resin. The structure is a special U-shaped ring design, which can effectively reduce the pressure of the main seal with the rod at high pressure, and extend the durability of the long rod seal system. Note that it cannot be used alone, but should be used together with the seal ring of the rod. Material selection has high temperature resistance type, high and low temperature resistance universal type to choose from. The notch design on the back of the lip eliminates pressure accumulation between the sealing rings.
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The buffer ring for BRK rod is a combination ring made of special PTFE material combined with NBR rubber. Due to the non-chimeric structure, it is necessary to pay attention to the orientation and position when installing. This design, combined with the choice of materials, can well avoid the crawling problem of the main seal used in the U-ring structure. At the same time, the processing method of turning determines its wide range of applicable sizes.
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