NATIONAL TOLL FREE DIRECTORY1-866-574-5100 | ON THE WEBwww.nee.ca PLANT, TRUCK & TANK EQUIPMENT BACK CHECK VALVES & SIGHT FLOW INDICATORS Marshall Excelsior High Flow Back Check Valves NEE # Application Seat Construction Inlet / Outlet Connection Flow Capacity @ 10 PSIG Differential Pressure Construction ME870-10 Tanks or In-line Metal to Metal or Soft Seat 1-1/4” FNPT x 1-1/4” MNPT 61 GPM Brass ME870-16 2” FNPT x 2” MNPT 187 GPM ME870-6 3/4” FNPT x 3/4” MNPT 24 GPM ME870S-10 1-1/4” FNPT x 1-1/4” MNPT 61 GPM Steel ME870S-16 2” FNPT x 2” MNPT 187 GPM ME870S-24 3” FNPT x 3” MNPT 449 GPM ME870S-6 3/4” FNPT x 3/4” MNPT 24 GPM ME870SBN-24* 3” FNPT x 3” MNPT 449 GPM ME870SS-10 1-1/4” FNPT x 1-1/4” MNPT 61 GPM Stainless ME870SS-16 2” FNPT x 2” MNPT 187 GPM ME870SS-6 3/4” FNPT x 3/4” MNPT 24 GPM ME872S-16 2” MNPT x 2” MNPT 187 GPM Steel ME872S-24 3” MNPT x 2” FNPT 449 GPM ME872SBN-24* * Note: For Butane capacity, multiply LP flow rate by .94; For NH3 - multiply LP flow rate by .90 Sight Flow Indicators The Squibb Taylor sight flow is designed to allow the insertion of a back check or excess flow valve in the piping system and provide an easy means of a visual inspection of the valve and verifying product flow. The Marshall Excelsior sight flow includes a back check flapper valve for an unrestricted one-way flow control. Both products are UL approved to 400 psi. NEE # Description A1742 2” F.NPT inlet & outlet, with Glass A1743 3” F.NPT inlet & outlet, with Glass NEE # Description ME875S-16 2” Sight Flow Back Check FNPT Ductile Iron ME875S-24 3” Sight Flow Back Check FNPT Ductile Iron Marshall Excelsior High Flow Back Check Valves provide back flow protection to container openings or liquid lines where flow is intended for one direction. The valve is normally held closed until pressure activates the valve when flow is directed into the piping or container causing the back check to open. When flow stops or reverses, the check returns to the closed position. All Marshall Excelsior High Flow Back Check Valves are supplied with “O”-ring soft seats which can be removed to allow a metal-to-metal seat when required. Features: Dual purpose - Soft Seat or Metal to Metal for wider applications with less inventory Universal seat - Remove O-ring to create metal to metal seating surface Maximum product flow achieved by full port and stem travel design All models feature Stainless Steel Stem, Spring and Valve Guide for long durable performance life Valve bodies and poppet assemblies available in brass, zinc plated steel or stainless steel Available from 3/4” to 3” Zinc plated and stainless steel models can be used with LP Gas or NH3 Shown with O-Ring Shown Metal to Metal with O-Ring removed ME872S-24 ME8755-16 A1742
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