Designed to provide protection of a container opening when desired flow is always into the vessel. May be used in line applications where flow must be limited to one direction.

When used with the appropriate single check filler valve, the combination forms a double check filler valve suitable for use in filling of bulk storage tanks.
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3146 Series 1 3/8 Inch (in) Wrench Hex Flats (C) Back Pressure Valve for Container or Line Applications - (003146#)

3146 Series 1 3/8 Inch (in) Wrench Hex Flats (C) Back Pressure Valve for Container or Line Applications
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3146 Series 1 3/8 Inch (in) Wrench Hex Flats (C) Back Pressure Valve for Container or Line Applications - (003146#)

3146 Series 1 3/8 Inch (in) Wrench Hex Flats (C) Back Pressure Valve for Container or Line Applications
Price QUOTE
3146 Series 1 3/8 Inch (in) Wrench Hex Flats (C) Back Pressure Valve for Container or Line Applications - (003146#)

3176 Series 2 Inch (in) Wrench Hex Flats (C) Back Pressure Valve for Container or Line Applications
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3146 Series 1 3/8 Inch (in) Wrench Hex Flats (C) Back Pressure Valve for Container or Line Applications - (A003146)

3146 Series 1 3/8 Inch (in) Wrench Hex Flats (C) Back Pressure Valve for Container or Line Applications
Price QUOTE
3176 Series 2 Inch (in) Wrench Hex Flats (C) Back Pressure Valve for Container or Line Applications - (A003176)

3176 Series 2 Inch (in) Wrench Hex Flats (C) Back Pressure Valve for Container or Line Applications
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Description N/A Designed to provide protection of a container opening when desired flow is always into the vessel. May be used in line applications where flow must be limited to one direction. When used with the appropriate single check filler valve, the combination forms a double check filler valve suitable for use in filling of bulk storage tanks.
Material N/A Brass N/A Brass N/A Brass N/A Steel N/A Steel
Inlet Connection Size (A) N/A 3/4 in N/A 3/4 in N/A 1 1/4 in N/A 3/4 in N/A 1 1/4 in
Inlet Connection Type (A) N/A Female National Pipe Thread (FNPT)
Outlet Connection Size (B) N/A 3/4 in N/A 3/4 in N/A 1 1/4 in N/A 3/4 in N/A 1 1/4 in
Outlet Connection Type (B) N/A Male National Pipe Thread (MNPT)
Wrench Hex Flats (C) N/A 1 3/8 in N/A 1 3/8 in N/A 2 in N/A 1 3/8 in N/A 2 in
Approximate Effective Length (D) N/A 1 15/16 in N/A 1 15/16 in N/A 1 13/32 in N/A 1 15/16 in N/A 1 13/32 in
Propane Liquid Capacity at 5 Pounds Per Square Inch Gauge (psig) Differential Pressure N/A 11 gpm N/A 11 gpm N/A 28 gpm N/A 11 gpm N/A 28 gpm
Propane Liquid Capacity at 10 Pounds Per Square Inch Gauge (psig) Differential Pressure N/A 16 gpm N/A 16 gpm N/A 40 gpm N/A 16 gpm N/A 40 gpm
Propane Liquid Capacity at 25 Pounds Per Square Inch Gauge (psig) Differential Pressure N/A 25 gpm N/A 25 gpm N/A 63 gpm N/A 25 gpm N/A 63 gpm
Propane Liquid Capacity at 50 Pounds Per Square Inch Gauge (psig) Differential Pressure N/A 36 gpm N/A 36 gpm N/A 89 gpm N/A 36 gpm N/A 89 gpm
Rating N/A Underwriters Laboratories (UL®) Listed
Alternate Part Number N/A 3146# N/A 3146S N/A 3176# N/A N/A
Size N/A 3/4 in N/A 3/4 in N/A 1-1/4 in N/A 3/4 in N/A 1-1/4 in
Additional Information N/A Rego® Back Pressure Check Valves are designed to allow flow in one direction only. The check, normally held in the closed position by a spring, precludes the possibility of flow out of the container. When flow starts into the container, the pressure overcomes the force of the spring to open the check. When the flow stops or reverses, the check closes.

Metal-to-metal seats will allow slight leakage after closure. These valves will restrict the escape of container contents in the event of accidental breakage of the piping or fittings.
Note N/A Multiply flow rate by 0.94 to determine liquid butane capacity and by 0.90 to determine liquid anhydrous ammonia capacity. N/A Soft seat version.
Multiply flow rate by 0.94 to determine liquid butane capacity and by 0.90 to determine liquid anhydrous ammonia capacity. 		N/A Multiply flow rate by 0.94 to determine liquid butane capacity and by 0.90 to determine liquid anhydrous ammonia capacity. N/A Multiply flow rate by 0.94 to determine liquid butane capacity and by 0.90 to determine liquid anhydrous ammonia capacity. N/A Multiply flow rate by 0.94 to determine liquid butane capacity and by 0.90 to determine liquid anhydrous ammonia capacity.