SPRING-LOADED PISTON SEAL
A special piston seal is completely energized by a coil seal spring between the seal and the piston wall. The seal provides a smooth sealing surface not possible with flat washers "curled into the wall (the method used in a common bicycle pump). With control systems that place a given volume of fluid in the piston cylinder, the 1815 valve holds position without internal piston leaks.
NEEDLE VALVE(S) CONTROL VALVE OPERATING SPEED
A needle valve(s) can be supplied in any of the sense lines to control liquid velocity in the line and thus determine how quickly the valve opens and/or closes.
"TRIM" SUPPLIED TO FIT APPLICATION
We supply the proper materials to fit each user's application. For example, selected parts are either nickel-plated or stainless steel when moisture is present in the line media.
SOLENOID VALVES OFFER SEAL OPTION
Standard valves have Viton™ seals. For special liquids, such as high percentage MTBE, solenoids should be ordered with Teflon™ seals.