Back Pressure Valves: M-Series Low-Flow

Griffco M-Series diaphragm low-flow back pressure valves are designed to enhance the performance of chemical feed systems by applying a continuous back pressure to the chemical feed pump, while also acting as an anti-syphon valve. Robust construction ensures reliability in the rigorous service of municipal and industrial applications.

Available Sizes

1/4″ to 1/2″ or DN 8 to DN 15

Maximum Flow Pulsating 300 gph (1135 lph)
Maximum Flow Continuous 15 gpm (57 lpm)
Maximum Pressure 350 psi (24 bar)

3D CAD Drawings Available

M-Series Low-Flow

Features

Anti-siphon function
Solid, robust, machined construction
Flanged, union, threaded, and socket connection options
Molded Noryl top with integral hardware locking
316L SS metal valve and top options
Molded PTFE/EPDM diaphragm
Adjustable up to 350 psi (24 bar)
4 optional pressure ratings (springs)
Valve sizes from 1/4″ to 1/2″ or DN 8 to DN 15
Tamper-resistant adjustment screw
High-temperature option up to 300°F (149°C)

Griffco Benefits

High reliability at an affordable price
Long diaphragm life
Wide range of valve materials
Multiple diaphragm material options
Factory or field settable
High-temperature option up to 300°F (149°C)

Wetted Materials

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

Optional ARV

Air release valves act as a priming valve for M-Series low-flow back-pressure valves.

SIZE

MAXIMUM FLOW
PULSATING

MAXIMUM FLOW
CONTINUOUS

MAXIMUM PRESSURE

IMPERIAL	METRIC	GPH	LPH	GPM	LPM	PSI	BAR
1/4″	DN 8	100	375	5	19	350	24
3/8″	DN 10	200	757	10	37	350	24
1/2″	DN 15	300	1,135	15	57	350	24

TITLE

DESCRIPTION

DATE MODIFIED

DOWNLOAD

SKU	Product	Description
BPM038PTVS	3/8″ M-Series Back Pressure Valve	PVC – PTFE/Viton – Socket
BPM038PU	3/8″ M-Series Back Pressure Valve	PVC – Union Connection – Viton O-ring – Socket Ends
BPM038PUD	3/8″ M-Series Back Pressure Valve	PVC – Metric Union Connection – Viton O-ring – Socket Ends
BPM038PV	3/8″ M-Series Back Pressure Valve	PVC – Viton
BPM038S	3/8″ M-Series Back Pressure Valve	316SS
BPM038S1	3/8″ M-Series Back Pressure Valve	316SS – 50 psi Spring..Pressure Set: 20 psi
BPM038S16ZOSS	3/8″ M-Series Back Pressure Valve	316SS – 316SS 50 psi Spring – Kalrez 4079 – 316SS Top ..Pressure Set: 20 psi
BPM038S19	3/8″ M-Series Back Pressure Valve	316SS – 0-50 Spring – Metal Adjustment Screw ..Pressure Set: 10 psi
BPM038S1BOSS	3/8″ M-Series Back Pressure Valve	316SS – 50 psi Spring – BSPT – 316SS Top..Pressure Set: 20 psi
BPM038S1TV	3/8″ M-Series Back Pressure Valve	316SS – PTFE/Viton – 50 psi Spring..Pressure Set: 20 psi

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M-Series BPM – Data Sheets
Data Sheet BPM (US)	Imperial	09-14-2020
Data Sheet BPM (Intl)	Metric	09-14-2020
Data Sheet BPM (Spanish)	Metric	09-14-2020
M-Series BPM – Air Release Valve (ARV) Data Sheet
Sight Glass		05-22-2021
ARV Priming Valve (US)	Air Release Valve (Imperial)	05-22-2021
ARV Priming Valve (Spanish)	Air Release Valve (Metric)	05-22-2021
M-Series BPM – IOM Manuals
IOM Manual BPM (US)	Imperial	05-21-2021
IOM Manual BPM (Spanish)	Metric	05-21-2021
M-Series BPM – Dimensional Drawings M-Series 2-Port @ 180° (1/4″ – 1/2″) (DN 8 – DN 15)
Dim BPM 2Port@180 Threaded US	1/4″ – 1/2″	08-23-2020
Dim BPM 2Port@180 Socket US	1/4″ – 1/2″	08-23-2020
Dim BPMF 2Port@180 Flanged US	1/4″ – 1/2″	08-23-2020
Dim BPMF 2Port@180 Flanged Metric	DN 8 – DN 15	08-23-2020
Dim BPMU 2Port@180 Union US	1/4″ – 1/2″	08-23-2020
Dim BPMU 2Port@180 Union Metric	DN 8 – DN 15	08-23-2020
M-Series BPM – Sectional Drawings
M001		08-26-2020