Back Pressure Valves: G-Series Medium-Flow

Griffco G-Series 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-siphon valve. Robust construction ensures reliability in the rigorous service of municipal and industrial applications.

As with all of the Griffco designs, the chemical feed system is safeguarded by applying a continuous back pressure to the chemical feed pump, while also acting as an anti-siphon valve. This new construction ensures increased leak-free reliability in the rigorous service of municipal and industrial applications.

Available Sizes

1/2″ to 4″ or DN 15 to DN 100

Maximum Flow Pulsating 5,157 gph (19,521 lph)
Maximum Flow Continuous 270 gpm (1,020 lpm)
Maximum Pressure 350 psi (24 bar)

3D CAD Drawings Available

G-Series Medium-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 (25 bar)
4 optional pressure ratings (springs)
Valve sizes from 1/2″ to 4″ or DN 15 to DN 100
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

Wetted Materials

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

SIZE

MAXIMUM FLOW
PULSATING

MAXIMUM FLOW
CONTINUOUS

MAXIMUM PRESSURE

IMPERIAL	METRIC	GPH	LPH	GPM	LPM	PSI	BAR
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	1,798	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

TITLE

DESCRIPTION

DATE MODIFIED

DOWNLOAD

G-Series BPG – Data Sheets
Data Sheet BPG (US)	Imperial	09-14-2020
Data Sheet BPG (Intl)	Metric	09-14-2020
Data Sheet BPG (Spanish)	Metric	09-14-2020
G-Series BPG – IOM Manuals
IOM Manual BPG (US)	Imperial	05-21-2021
IOM Manual BPG (Spanish)	Metric	05-21-2021
IOM Manual – BPG 3″ & 4″ (DN 80 & DN 100)	Imperial	05-22-2021
G-Series BPG – Dimensional Drawings G Series 2-Port @ 180° (1/2″ – 1″) (DN 15 – DN 25)
Dim BPG1 2Port@180 Threaded US	1/2″ – 1″	08-23-2020
Dim BPG1 2Port@180 Socket US	1/2″ – 1″	08-23-2020
Dim BPGF 2Port@180 Flanged US	1/2″ – 1″	08-23-2020
Dim BPGU 2Port@180 Union US	1/2″ – 1″	08-23-2020
Dim BPG1 2Port@180 Threaded Metric	1/2″ – 1″	08-23-2020
Dim BPG1 2Port@180 Threaded Metric	DN 15 – DN 25	08-23-2020
Dim BPG1 2Port@180 Socket Metric	DN 15 – DN 25	08-23-2020
Dim BPGF 2Port@180 Flanged Metric	DN 15 – DN 25	08-23-2020
Dim BPGU 2Port@180 Union Metric	DN 15 – DN 25	08-23-2020
G-Series BPG – Dimensional Drawings G Series 2-Port @ 180° (1-1/2″ – 2″) (DN 40 – DN 50)
Dim BPG1 2Port@180 Threaded US	1-1/2″ – 2″	08-23-2020
Dim BPG1 2Port@180 Socket US	1-1/2″ – 2″	08-23-2020
Dim BPGF 2Port@180 Flanged US	1-1/2″ – 2″	08-23-2020
Dim BPGU 2Port@180 Union US	1-1/2″ – 2″	08-23-2020
Dim BPG1 2Port@180 Threaded Metric	DN 40 – DN 50	08-23-2020
Dim BPG1 2Port@180 Socket Metric	DN 40 – DN 50	08-23-2020
Dim BPGF 2Port@180 Flanged Metric	DN 40 – DN 50	08-23-2020
Dim BPGU 2Port@180 Union Metric	DN 40 – DN 50	08-23-2020
G-Series BPG – Dimensional Drawings G Series 2-Port @ 180° (3″ – 4″) (DN 80 – DN 100)
Dim BPG5 2Port@180 Flanged US	3″ – 4″	09-01-2020
Dim BPG5 2Port@180 Flanged Metric	1-1/2″ – 2″	09-01-2020
G-Series BPG – Sectional Drawings
G001	—	08-26-2020

SKU	Product	Description
BPG050AF	1/2″ G-Series Back Pressure Valve	A20 – 150# Flange
BPG050AF300	1/2″ G-Series Back Pressure Valve	A20 – 300# Flanges
BPG050AFBWOSS	1/2″ G-Series Back Pressure Valve	A20 – 150# Butt-Weld Flanges – 316SS Top
BPG050AFF300	1/2″ G-Series Back Pressure Valve	A20 – 300# Flat Face Flanges
BPG050AFMSS300	1/2″ G-Series Back Pressure Valve	A20 – 350 psi Spring – 300# Flanges – 316SS Top
BPG050AFOSS	1/2″ G-Series Back Pressure Valve	A20 – 150# Flanges – 316SS Top
BPG050AMSS	1/2″ G-Series Back Pressure Valve	A20 – 350 psi Spring – 316SS Top
BPG050AOSS	1/2″ G-Series Back Pressure Valve	A20 – 316SS Top
BPG050AS	1/2″ G-Series Back Pressure Valve	A20 – Socket
BPG050AS29	1/2″ G-Series Back Pressure Valve	A20 – Socket – 250 psi Spring – Metal Adj. Screw

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