V-Packings
V-ring packings are reciprocating seals with V-shaped cross-section lips, stacked in multiple rings and assembled between male adapters (support rings) and female adapters. Axial tightening at the gland presses the lips against the shaft and groove faces, and fluid pressure further opens the lips to increase sealing force. The number of stacked rings adjusts sealing performance, and the flexible lips conform well to shaft runout and large housing tolerances. Materials include rubbers such as NBR and FKM, fabric-reinforced rubber, and PTFE. They are used in hydraulic cylinder rods and pistons, water hydraulic equipment, plunger pumps, and chemical and food processing equipment. They are also widely used for repair and replacement of existing housings.
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V-Packings
V-Packing / Rod Seal (S1012-M/S1012-T/S1012-T1/S1315-T/S2527-F/S2931-F/S32-P)
V-packing set for high-load hydraulic equipment. Used in combination with PTFE or resin adapters.
SKF
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V-Packings
K24-P V-Packing
Model: K24-P
Replacement V-packing with flexible sealing lip for existing metal housings.
SKF
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V-Packings
K32-P V-Packing Set
Model: K32-P
Hydraulic V-packing set with extremely flexible lips that adapts to insufficient guidance and large tolerances.
SKF
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V-Packings
K1012-M V-Packing Set
Model: K1012-M
V-packing set with surface trimming process for high-load hydraulic equipment.
SKF
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V-Packings
K1012-T V-Packing Set
Model: K1012-T
V-packing set for high-load hydraulic equipment used in cutting processes.
SKF
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V-Packings
K1315-T V-Packing Set
Model: K1315-T
V-packing set with flexible lips that provides good sealing in relatively high-pressure ranges.
SKF
How to choose V-Packings
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1. Match shaft and groove dimensions
Inner diameter d corresponds to the shaft (rod) diameter, and outer diameter D corresponds to the groove diameter. V-ring packings seal through lip compression allowance, so dimensional mismatch leads to leakage, excessive friction, and early wear. When replacing, measure the actual housing and shaft dimensions and tolerances rather than relying on the existing part, and verify against them.
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2. Check stack height and groove depth
Height H is the dimension when stacked including adapters and must match the axial length of the groove (packing chamber). If the height does not match, the gland cannot be tightened properly; under-tightening causes leakage, and over-tightening causes heat generation and increased sliding resistance.
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3. Select a stack configuration suited to operating pressure
V-ring packings can handle higher pressures as the number of rings increases. The maximum operating pressure of listed products is indicated as 500 to 600 MPa, but this value is conditional. Confirm the actual continuous and surge pressures, along with the ring count and adapter configuration, in the manufacturer's documentation.
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4. Select materials suited to fluid and temperature
NBR suits mineral-based hydraulic oils, FKM suits high temperatures and chemical resistance, fabric-reinforced rubber suits high pressure and wear resistance, and PTFE suits low friction and broad chemical resistance. Confirm material compatibility with both the applied fluid, such as hydraulic oil, water, or chemicals, and the operating temperature range.
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5. Observe the maximum sliding speed
V-ring packings have a large contact area and tend to generate frictional heat, so they are not suited to high-speed reciprocating motion. The maximum sliding speed of listed products is 0.5 m/s. Applications exceeding this speed will accelerate degradation from heat, so verify stroke speed and consider other seal types.
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6. Consider guide accuracy and installation conditions
Where guiding is insufficient and the shaft runs out, or housing tolerances are large, types with flexible lips tend to follow the motion more easily. Select a type suited to the installation environment, including ease of disassembly and replacement and whether gland tightening adjustment is possible.
This guide was written by AI based on the listed products' documents and specification items. Check each manufacturer's documents before adopting.