Ball Valve Accessories
Repair Kits for High Pressure
Ball Valves BV2, BV2B & BV3
Repair Kits
Repair kits for use with high pressure ball valves (BV2, BV2B & BV3)
BV2 & BV3 (Block Style)
Standard Repair Kit
2 POM Ball Seats
2 NBR Adapter O-Ring
1 Stem O-Ring
1 POM Stem Seal Ring
BV2B (Round Body)
Standard Repair Kit
2 POM Ball Seats
2 NBR Adapter O-Ring
1 Stem O-Ring
1 POM Stem Seal Ring
O-Ring General Principles
The simple geometry is the main characteristic of an O-Ring which in conjuction with proper elastomer
selection results in a low cost, easy to use and efficient sealing system. Elastometric materials, when
compressed, react like a high viscosity fluid which transmits applied stress in every direction; consequently, the O-Ring serves as a barrier, blocking the leak paths between the sealing surfaces. Technical sealing has been defined by DIN standards as follows:
• “Static Seal” - The sealing action created between two mating surfaces with no leakage of liquid
or minimal duffusion of gas.
• “Dynamic Seal” - The mating surfaces have relative movement with minimal leakage of liquid
(useful to protect the sealing efficiency, acting as a lubricant).
O-Rings offer several advantages over the sealing systems: simplicity of construction, standardized
seal dimensions, wide selection of materials, suitability for both static and dynamic applications, standard dimensioning of glands, low cost due to high volume manufacturing. Sealing is always acheived
through a positive compression of squeezing action, resulting in a deformation of the O-Ring cross
section. The most important sealing characteristic of an O-Ring is its resistance to compression set or
residual deformation.
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DNP Americas | 281-388-0253 | fax 281-388-1902 | www.dnpamericas.com