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V-Packings

Product catalog summary

Overview: V-packings and V-packing kits are designed for sealing rods subjected to axial motion. These kits include the necessary number of V-packings, a base, and an end ring. For high-pressure applications, metallic materials may be used for the base and end rings to prevent gap extrusion. An axially acting spring is recommended for adjusting the packing due to thermal expansion.

Benefits:

No stick-slip even at low sliding speeds.
Low breakaway forces after downtimes.
Low wear and long service life.
Good sealing performance with multiple sealing edges.
High reliability with multicomponent sealing kits.
Simple installation design.
Excellent chemical and thermal resistance.
Extensive product line for various applications.
No special maintenance required.

Design and Application: V-packings are used in equipment like plunger piston pumps, metering pumps, hydraulic cylinders, and valve stems across industries such as chemical, petrochemical, pharmaceutical, and food processing.

Pre-Loading by Axially Acting Spring: The specific surface compression for springs should be between 0.2 and 0.4 N/mm², with the HN 7001 type possibly requiring up to 0.8 N/mm².

Versions and Operating Limits:

HN 7001 and HN 7002 have a maximum sliding speed of 0.5 m/s.
Temperature range: -200°C to +240°C.
HN 7001 supports up to 300 bar pressure; HN 7002 supports up to 100 bar.

Fitting Instructions:

Install packings with sealing lips towards the pressure side.
Springs are typically installed on the pressure side.
For aggressive media, adjust spring compression to maximum media pressure.
Clean installation space before fitting.
Provide lead-in chamfers on rod and housing bore to avoid damage.

Surface Quality: Surface quality specifications are provided for dynamic and static applications, with specific roughness values.

Disclaimer: The information is based on extensive experience but does not claim completeness. Installation should be performed by trained staff, and specifications are subject to change.

Catalog excerpts

Benefits • No stick-slip even with low sliding speeds • Extremely low breakaway forces even after prolonged downtimes • Low wear and long service life • Good sealing performance due to several sequentially located sealing edges • High operating reliability thanks to multicomponent sealing kit • Simple design of installation spaces • Very good chemical and thermal resistance • Extensive product line tailored to field application requirements • No special maintenance requirements -packings and V-packing kits are primarily used for sealing rods subjected to axial motion. A packing kit consists of the number of V-packings needed for the particular application requirements as well as a base and end ring. In case there is a risk of gap extrusion under high pressure loads, the base and end rings may also be made of metallic materials. To achieve pre-defined sealing forces and adjustment of the packing in case of thermal expansion, installation of an axially acting spring (compression spring or cup spring) is necessary.

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Fields of Application • Equipment such as plunger piston pumps, metering pumps, hydraulic cylinders, control and shut-off fittings and valve stems • Industrial sectors, such as chemical, petrochemical, flue gas purification, pharmaceutical, food processing, painting, steel, fittings HN 7001 and HN 7002 Sliding speed Temperature range HN 7001 Service pressure Pre-Loading by Axially Acting Spring Based on experience, the specific surface compression of both springs should be between 0.2 and 0.4 N/mm2. With the slightly stiffer type HN 7001 it may be necessary to increase preload to 0.8 N/mm2....

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.

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