Oil Impregnated Stainless Steel Bearings
The MultiPort Valve has 300 series stainless steel bearings, making them highly corrosion resistant. The bearing is formed by pressing powdered stainless steel into the bearing shape, which is then impregnated with a lubricant, providing maximum lubricity.
P.T.F.E. Grit Seals
To prevent grit and debris from damaging the bearing, the MultiPort Valve has P.T.F.E. (Teflon) seals above and below the plug. These seals are held in compression between the plug body and bonnet, sealing the critical bearing area from the ingress of dirt and grit.
Self Adjusting Stem Seals
Two self-adjusting, wear compensating, pressure energised ‘U’ cup seals are used to ensure a positive stem seal. An ‘O’ ring inside the ‘U’ cup provides the necessary pre-loading to guarantee sealing under low pressure, while the expansion of the ‘U’ cup at higher pressures prevents leakage. This packing is especially well suited to buried, submerged and hard to get to applications. In the unlikely event of stem seal failure these seals can be easily replaced without removing the bonnet from the valve.