Honeywell NK300S Boiler Feed Combination Valve

The NK300S is a (re)filling combination valve that contains an integrated pressure reducing valve, strainer, double check backflow preventer with air vent (to protect potable water supply against back flow of heating water into supply pipe), two shut-off ball valves, pressure gauge, and conveniently located test ports for easy inspections and check out.

ApplicationCombination (re)filling valve that contains an integrated pressure reducing valveMaximum Safe Operating Pressure (psi)150 psiMaximum Safe Operating Pressure (kPa)1034 kPaWeight (lb)4 lbWeight (kg)1.8 kgItem TypeProductAmbient Temperature Range (F)33 F to 140 FAmbient Temperature Range (C)1 C to 60 CPressure Range (psi)10 to 58 psiMinimum flow rate (gpm)16 gpm @ 22 psi pressure fall-offConnection TypeIncludes sweat and threaded connectionsPipe Size (inch)1/2 in.

Pipe Size (DN)Dn 15Fluid Temperature (C)Maximum 82 CFluid Temperature (F)Maximum 180 FMaximum Differential Pressure Ratings (Close-off) (psi)14.5 psi minimum (inlet to outlet)Valve TypeFast FillControlled FluidWaterMaterials (Body)BrassMinimum flow rate (lpm)60 l/min @ 1.5 bar pressure fall-offMaterials (Diaphragm)Fiber-reinforced EPDMMaterials (Interior parts)Stainless steel fine filter mesh filterOutlet Pressure Adjustment Range (psi)Factory set at 15 psi (1 bar)Max. Inlet Pressure Rating (psi)150 psi (10.3 bar)Approvals, ASSE1081 Listed