Single acting NBR rubberised fabric rod / piston seal. PVM include NBR V-Rings as standard.

- Design -

Claron Style PV and PVM is a single acting rod or piston seal for medium to heavy duty applications. The assembly consists of a male and female header and a series of 'V' rings. The number of 'V' rings may be varied to alter the assembled height. The material is generally fabric reinforced NBR rubber, although style PVM incorporates an 'NBR only' 'V'-ring to assist low pressure sealing. This is now a non preferred design, but it still has a place in application where difficult conditions prevail such as pressure surges and misalignment.

- Operating Conditions -

Maximum Pressure

Max Speed
Temp. Range
-30°C to 100°C
400 Bar
700 Bar
These range perameters are Maximum simultaneous conditions.
Optimum service conditions are affected by temperature, speed, pressure, surface finish and extrusion gaps.

Note: Clearance gap F is the maximum permissable. i.e. gap completely on one side, in the temperature range of -30°C to 100°C.
The use of a suitably selected Claron bearing ring will effectively reduce the clearance gap F max. to a value closer to F/2 thus increasing the pressure capability of the seal.

- Housing -

For surface finish and recommended lead in chamfers refer the illustration below. For housing dimensions and machining tolerances refer to the table of recommended sizes and Tolerance Tables for value of tolerence symbols

- Fitting -

Style PV and PVM are designed to be fitted to a split gland or piston. For the seal to function correctly, it is important that care be taken in fitting the seal within its housing.
For installations with spacers use dimensions Y and L2 without spacers use L1 For details refer to Seal Installation.

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