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V-Packings

Chevron Packing rings, also called as V-packings, have a very good sealing performance is achieved through multiple sealing lips and the longer contactm surface. Each V-packing consists of a base ring, two or more intermediate rings, and a non-sealing head ring. The sealing rings have double lips to seal against both the bore and the rod of a system, and the head ring and intermediate rings all have a V-shaped base that enables the V-packing to respond automatically to changes in system pressure.

Consult

Main Features

A long service life

Exceptionally wear-resistant

Good elasticity

It has strong adaptive load against axial and radial viberation

It can bear the high temperature and changeable pressure

It is easily to be installed

Typical Applications

Plungers in hydraulic cylinders

Angle seat piston valves

Rod seals

Piston seals

The Type of Packings

Low pressure V-ring set (LVS)	Medium pressure V-ring set (MVS)	High pressure V-ring set (HVS)
Pressure range: < 5Mpa	Pressure range: 5Mpa - 10Mpa	Pressure range: 10Mpa - 25Mpa

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Material Selection

Materials	Characteristics
Virgin PTFE	Low friction coefficient, low gas permeability, low thermal conductivity, limited abrasion resistance, application in food environments.
Modified PTFE	Excellent for light to moderate dynamic and static service. Limited wear and heat resistance. Low gas permeability. Good cryogenic properties. FDA compliant. Good in creep and extrusion resistance.
PTFE + carbon	Good pressure stability, improved thermal conductivity, good wear resistance, suited especially forwater as medium, filler material can be attacked by oxidizing media.
PTFE + graphite	Good sliding and lubrication properties, protects counterfaces, especially suited for soft counterfaces, very good in steam-driven applications, not suited for hard metals, filler material can be damaged by oxidizing media.
PEEK	PEEK offers chemical resistance that is similar to that of PTFE, but with better mechanical characteristic. FDA-compliant, therefore It is suitable for applications in the food industry.
Flexible graphite	This type of V-packing with corrosion resistance, high temperature performance. But also has good self-lubricating, good flexibility, small torque characteristics.