Back Pressure Valve (BPV)

Back pressure valves are mounted on the discharge line to ensure a constant pressure for the discharge check assembly on the metering pump

AQU Valve is a diaphragm style two port back pressure/pressure sustaining valve designed to provide and control a continuous pressure on the discharge side of a positive discharge style pump, such as metering pumps. AQU Valve assists with the proper seating of the valve check assembly and accurate filling of the pump housing chamber for a more efficient and accurate running pump. (Factory set @ 50 psig /345kPa)

Standard Features:

No moving parts in wetted chamber; superior choice for “dirty” fluid applications .

High flow capacity with lower pressure drop.

Optional diaphragm materials.

Color coded caps indicate size.

Sizes ¼” to 4” (8 DN to 100 DN).

 10 configurations: threaded, socket, union   and flanged.

 Injection mould design with fewer moving parts.

High ambient temperature ranges.

Gauge port available in either flow direction.

 

 

BPV-dims

PVC, CPVC, PP, & PVDF Back Pressure Valves

NPSSeriesØ DJHL (Thread)L (Socket)L (Union)L (Flanged)
1/4"A2.500.664.483.403.40N/A6.00
3/8"A2.500.664.483.403.40N/A6.00
1/2"A2.500.664.483.403.405.406.00
1/2"B3.500.884.804.854.856.936.96
3/4"B3.500.884.804.854.857.376.96
1"B3.500.884.804.854.857.486.96
1"C4.001.475.754.904.907.599.96
1 1/4"C4.001.475.754.904.907.889.96
1 1/2"C4.001.475.754.904.909.279.96
2"C4.001.475.754.904.909.619.96

316 SS Back Pressure Valves

NPSSeriesØ DJHL (Thread)L (Socket)L (Flange)
1/4"A2.500.604.472.502.50N/A
3/8"A2.500.494.582.502.50N/A
1/2"A2.500.604.722.502.506.25
1/2"B3.500.634.803.503.507.25
3/4"B3.500.734.803.503.507.48
1"B3.500.865.103.503.507.63
1"C4.001.055.784.004.008.15
1 1/4"C4.001.055.784.004.008.14
1 1/2"C4.001.455.834.724.729.60
2" C4.001.455.824.724.729.72

BPV-Performance-Curce

The overpressure vs. flow rate curve is based on a valve spring pressure of 50 PSIG (345 kPa).

P1 = working pressure P set = 50 PSIG (345 kPa).

Example:

ECO-55 100 PSIG – 50 PSIG = 50 PSIG = 34 USGPM

690 kPa – 345 kPa = 345 kPa = 128.4 LPM

PVCCPVCPPPVDF
70-9021-321.001.001.001.00
10038.901.001.001.00
11043.831.00.911.00
11546.751.00.871.00
12049.661.00.831.00
12552.58.97.791.00
13054.50.95.751.00
14060.33.90.661.00
15066NR.80.60.97
17077NR.60.43.86
18082NR.50.33.80

The maximum pressure rating for valves regardless of size is 150 PSIG (1034 kPa) at 73o F (22oC).

As ambient, collective surface and fluid temperature increases, the maximum valve pressure rating decreases. The decrease is dependent on the thermoplastic valve material.

Example: CPVC valve operating at 140°F (60°C) Factor at 140°F (60°C) = .90 150 PSIG x .90 = 135 PSIG

Valve is de-rated to 135 PSIG

NR = not recommended