Back Pressure Valves

Help stabilize the downstream pressure and deliver consistent flow

Back Pressure Valves ensure that certain types of pumps deliver consistent flows or allow for high accuracy and stable operation. Also known as loading valves or anti-siphon valves.

3D CAD Drawings Available

Model	Size		Maximum Flow Pulsating		Maximum Flow Continuous		Maximum Pressure
	Inch	Metric	GPH	LPH	GPM	LPM	PSI	BAR
M-Series » M-Series Low Flow	1/4″	DN 8	100	375	5	19	350	24
		3/8″	DN 10	200	757	10	37	350	24
		1/2″	DN 15	260	984	15	57	350	24
Unibody »	1/2″	DN 15	260	984	15	57	150	10
		3/4″	DN 20	300	1,135	19	72	150	10
		1″	DN 25	500	1,890	26	98	150	10
G-Series » G Series Medium Flow	1/2″	DN 15	320	1,211	17	63	350	24
		3/4″	DN 20	367	1,389	19	72	350	24
		1″	DN 25	462	1,748	24	90	350	24
		1-1/2″	DN 40	1,388	5,254	72	275	250	17
		2″	DN 50	1,533	5,803	80	302	250	17
		3″	DN 80	5,157	19,521	270	1,020	250	17
		4″	DN 100	5,157	19,521	270	1,020	250	17
High Flow »	1/2″	DN 15	600	2,271	30	114	250	17
		3/4″	DN 20	600	2,271	30	114	250	17
		1″	DN 25	1,000	3,785	54	204	250	17
		1 1/2″	DN 40	5,157	19,521	270	1,020	250	17
		2″	DN 50	5,157	19,521	270	1,020	250	17
Medium Pressure »	1/4″	DN 8	250	946	13	49	800	55
		3/8″	DN 10	490	1,854	25	94	800	55
		1/2″ M-Series	DN 15	700	2,649	36	136	800	55
		1/2″ G-Series	DN 15	740	2,801	38	143	800	55
		3/4″	DN 20	850	3,217	44	166	800	55
		1″	DN 25	1,060	4,012	56	211	800	55
PTFE Flanged »	1/2″	DN 15	320	1,211	17	63	350	24
		3/4″	DN 20	367	1,389	19	73	350	24
		1″	DN 25	462	1,749	24	92	350	24

Standard Materials

Polypropylene
PVC
CPVC
PVDF
PTFE
Halar®
316L SS
Alloy 20
Hastelloy® C

Standard Connections

Threaded
Flanged
Union
Socket

Spring Ranges

10 to 150 psi (1 to 10 bar) standard
0 to 50 psi (0.0 to 3.5 bar)
10 to 250 psi (1 to 17 bar)
50 to 350 psi (3.5 to 25 bar)

Diaphragm Materials

EPDM/PTFE (standard)
FKM (Viton®)
CSM (Hypalon®)
PTFE/FKM
Kalrez®

Configurations

180˚ ports (standard)
90˚
Wall mount

Options

Priming port
Adjustment knob
Metal tops
Metal adjustment screw
Material certifications

M-Series – Low flow (1/4″ to 1/2″ or DN 8 to DN 15)
G-Series – Medium to large flow (1/2″ to 4″ or DN 15 to DN 100)
High Flow – High flow (1/2″ to 1″ or DN 15 to DN 50)
Medium Pressure – Medium Pressure to 800 psi (55 bar) (1/4″ to 1″ or DN 8 to DN 25)

Variations and Options Include:

Unibody – Valve with union connections, made from a solid PVC or CPVC body
PTFE Flanged – G-Series valve with flange connections, made from a solid PTFE body
ARV – Air release valve acts as a priming valve for a back pressure valve