Valtek Flow Boosters.pdf - PRO-QUIP

Piston ActuatorFlow BoosterSupplyFlow BoosterOutput 2Output 1PositionerSignalSupplyE0115Figure 2: Typical Flow Booster Installation Schematic on Cylinder ActuatorReplacing the Poppet ValveIf the urethane seat on the poppet is cut, damaged orseverely indented, the poppet must be replaced. To dothis, refer to Figures 1 and 4, and proceed as follows:1. Turn the flow booster upside down and remove theend plug. Note that the poppet valve, lower springcap and lower spring may freely drop from thebooster. Check the end plug O-ring for wear ordamage. Replace if necessary.2. Remove the lower spring, lower spring cap and thepoppet valve.3. Before placing a new poppet valve in the boosterhousing, apply an anti-seize lubricant to the insidebore of the end plug. Re-install the lower springand the lower spring cap. Place a new poppet intothe hole of the lower spring.4. While holding the flow booster in an upright position,carefully insert the poppet and end plug assemblyinto the housing.5. Tighten the end plug.34-4