Gemini Valve Code: 1/2 87-6-RTV-6-S22-C90BDBN-4GP-SC03D-24VDC-DSD
Gemini’s Performance Automation Series was designed exclusively for enduring automation. Ideal for a wide variety of OEM and end user applications involving high cycling or when extended, maintenance-free service life is required. bAdditionally several materials of construction are NSF® / ANSI 169 Certifi ed making this series suitable for wide range of commercial cooking equipment and related applications. Available in standard pipe sizes ¼” – 2”. Other sizes and / or connections may be available upon request. Recently added to this series is a diverter or selector style 3-port model. Contact us for details.
Typical applications include test, fluid fill, batching, drain, or anywhere quick positive on / off control is required. Standard valve body materials include brass and stainless steel. Carbon steel available upon request. Seals include P.T.F.E. Glass Filled Teflon ® seats and Viton® stem seals. Optional seals available including E.P.D.M (Ethylene-Propylene-Diene Monomer).
Valve seal leakage can be problematic for high cycle or extended service applications. Gemini’s Performance Automation Series incorporates two unique design features on the stem and mounting which enable long, leak-tight service
life.
While all Gemini Valve ball valves feature a proven wear and thermal compensating stem seal design, the addition of two O-ring seals adds a new dimension. Stem seal integrity is achieved by three independent and distinct elements. A lower, dual purpose stem seal and thrustbearing made from reinforced Tefl on® acts as a primary static seal. A center O-ring seal provides the main dynamic seal. The gland for this O-ring is located on the stem so that it maintains a predictable preload. Finally, an external O-ring provides both a secondary static and dynamic seal. This fi nal seal is spring compensated to make up for extreme cycling and wear. As the O-ring and Tefl on® seal wears, the springs apply a constant axial force on a hardened stainless washer forcing the O-ring below to expand radially and maintain contact with the stem. The traditional stem (packing) nut has been eliminated and replaced with a captive, fi xed-preload retaining ring. This eliminates the danger of incorrectly tightening the nut which can result in premature stem seal leaks. The valve is designed to maintain its integrity without any adjustment or maintenance of the stem seal preload.
A key element in long stem seal life is to minimize stem side loading resulting from valve to actuator mis-alignment. Our unique valve to actuator coupling system utilizes a precisely machined locating bonnet and mating actuator gland to ensure nearly perfect alignment. Two intersecting clamp screws are used to complete the mounting process by pulling the valve into the actuator and locking it rigidly in place. These clamp screws are easy accessible making the
usual chore of joining or separating the valve from the actuator simple and quick. Additionally, the relative torque between the actuator and valve is absorbed independent of the clamp screw by means of a four corner mounting pad that straddles a mating projection on the valve body. This locks the valve in position and eliminates the risk of the valve loosening while in service.
This valve is combined with the Pneumatic actuator C90BDBN. Gemini’s Performance Automation Series Electric Actuators are the ideal alternative for a wide variety of OEM and End User applications where slow, bulky, unreliable, or short life actuation is problematic. Featuring a quick 1.5 second cycle (index) speed. Enclosed in an ultra-compact General Purpose Enclosure is our durable worm drive transmission powered by a 24VDC gear motor. The drive train is permanently lubricated for maintenance free operation. Additionally a bearing-supported drive train ensures long, reliable performance.
The Pneumatic actuator is electrically controlled with a 24 volt DC signal using the NAMUR solenoid valve 4GP-SC03D-24VDC-DS
