Back Pressure Valve

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Low-Pressure Back Pressure Valve

Low-Pressure Back Pressure Valve

A low-pressure diaphragm back-pressure valve is an essential component used to stabilize the pressure in front of the valve, prevent pump self-flow, and siphon in a wide range of industries. It is commonly used in conjunction with a metering pump to improve its metering accuracy.


Technical Parameters:

Adjustable pressure range:  0-0.3MPa, 0-1.0MPa (see parameter table for details)

Safety test pressure:  1.5 times the maximum input pressure

Applicable temperature:  Ordinary diaphragm (-5℃ to +80℃); 

                                          PTFE diaphragm (-40℃ to +150℃)

Material:

Lower valve body (flow-through part): PVC, SS304, SS316L, PTFE lining, PVDF, PP, carbon steel, Hastelloy, etc. 

Diaphragm: EPDM lined with PTFE, PTFE, metal diaphragm, UPE, etc.

Upper valve body: Nylon, carbon steel, SS304, SS316L, etc.


The valve features a diaphragm that responds quickly to changes in pressure and adjusts the valve opening accordingly to maintain a constant pressure. This ensures a stable flow rate and prevents overpressure or underpressure in the system. With its low-pressure capabilities, this type of back-pressure valve is suitable for a range of applications where precise control of pressure and flow is required, such as in chemical processing, water treatment, and pharmaceutical manufacturing.

The low-pressure diaphragm back-pressure valve is an efficient solution to maintain stable pressure in a system, prevent pump self-flow and siphon, and improve the accuracy of metering pumps. Its fast response, precise control, and versatility make it an indispensable tool for a wide range of industries.


Design features of a back pressure valve:

The structure is of a spring diaphragm type, with adjustable pressure, providing stable pressure for the valve.

The contact medium includes the lower valve body and diaphragm, and the sealing part of the lower valve body and diaphragm is processed with a sealing rib, which has a good sealing effect and high sensitivity.

The conventional diaphragm is made of EPDM or PTFE, and processed with cloth for good sealing effect and high service life. The pure PTFE diaphragm has high temperature resistance and strong corrosion resistance.


Model parameter of low pressure diaphragm back pressure valve:

ModelMaterialNominal Dia.（mm）Setting Pressure(MPa)DimensionStandard connection
Lower Valve Body Dia.(mm)Total Hight(mm)
RXBF-P6/1.0PVC60.1-1.064.782Rc1/8”
RXBF-P8/1.0PVC80.1-1.064.787Rc1/4”
RXBF-P10/1.0PVC100.1-1.064.789Rc3/8”
RXBF-P15/1.0PVC150.1-1.064.794Rc1/2”
RXBF-P20/1.0-NPVC200.1-1.064.7104Rc3/4”
RXBF-P20/1.0PVC200.1-1.087123Rc3/4”
RXBF-P25/1.0PVC250.1-1.087128Rc1”
RXBF-P32/1.0PVC320.1-1.0117175Rc1 1/4”
RXBF-P40/1.0-NPVC400.1-1.0117185Rc1 1/2”
RXBF-P40/1.0PVC400.1-1.0137240Rc1 1/2”
RXBF-P50/1.0PVC500.1-1.0167260Rc2”
RXBF-P65/1.0PVC650.1-1.0177325Rc2 1/2”
RXBF-P80/0.6PVC800.1-0.6230420Rc3”
RXBF-P100/0.6PVC1000.1-0.6250430Rc4”
RXBF-B6/1.0PP60.1-1.064.782Rc1/8”
RXBF-B8/1.0PP80.1-1.064.787Rc1/4”
RXBF-B10/1.0PP100.1-1.064.789Rc3/8”
RXBF-B15/1.0PP150.1-1.064.794Rc1/2”
RXBF-B20/1.0-NPP200.1-1.064.7104Rc3/4”
RXBF-B20/1.0PP200.1-1.087123Rc3/4”
RXBF-B25/1.0PP250.1-1.087128Rc1”
RXBF-B32/1.0PP320.1-1.0117175Rc1 1/4”
RXBF-B40/1.0-NPP400.1-1.0117185Rc1 1/2”
RXBF-B40/1.0PP400.1-1.0137240Rc1 1/2”
RXBF-B50/1.0PP500.1-1.0167260Rc2”
RXBF-B65/1.0PP650.1-1.0177325Rc2 1/2”
RXBF-B80/0.6PP800.1-0.6230420Rc3”
RXBF-B100/0.6PP1000.1-0.6250430Rc4”
RXBF-S6/1.0SUS30460.1-1.064.782Rc1/8”
RXBF-S8/1.0SUS30480.1-1.064.787Rc1/4”
RXBF-S10/1.0SUS304100.1-1.064.789Rc3/8”
RXBF-S15/1.0SUS304150.1-1.064.794Rc1/2”
RXBF-S20/1.0-NSUS304200.1-1.064.7104Rc3/4”
RXBF-S20/1.0SUS304200.1-1.087123Rc3/4”
RXBF-S25/1.0SUS304250.1-1.087128Rc1”
RXBF-S32/1.0SUS304320.1-1.0117175Rc1+1/4”
RXBF-S40/1.0-NSUS304400.1-1.0117185Rc1 1/2”
RXBF-S40/1.0SUS304400.1-1.0137240Rc1 1/2”
RXBF-S50/1.0SUS304500.1-1.0167260Rc2”
RXBF-S65/1.0SUS304650.1-1.0177325Rc2 1/2”
RXBF-S80/0.6SUS304800.1-0.62254203” flanged 
RXBF-S100/0.6SUS3041000.1-0.62404304”flanged 
RXBF-L6/1.0SUS316L60.1-1.064.782Rc1/8”
RXBF-L8/1.0SUS316L80.1-1.064.787Rc1/4”
RXBF-L10/1.0SUS316L100.1-1.064.789Rc3/8”
RXBF-L15/1.0SUS316L150.1-1.064.794Rc1/2”
RXBF-L20/1.0-NSUS316L200.1-1.064.7104Rc3/4”
RXBF-L20/1.0SUS316L200.1-1.087123Rc3/4”
RXBF-L25/1.0SUS316L250.1-1.087128Rc1”
RXBF-L32/1.0SUS316L320.1-1.0117175Rc1 1/4”
RXBF-L40/1.0-NSUS316L400.1-1.0117185Rc1 1/2”
RXBF-L40/1.0SUS316L400.1-1.0137240Rc1 1/2”
RXBF-L50/1.0SUS316L500.1-1.0167260Rc2”
RXBF-L65/1.0SUS316L650.1-1.0177325Rc2 1/2”
RXBF-L80/0.6SUS316L800.1-0.62254203” flanged 
RXBF-L100/0.6SUS316L1000.1-0.62404304”flanged 
RXBF-A6/1.0Carbon steel60.1-1.064.782Rc1/8”
RXBF-A8/1.0Carbon steel80.1-1.064.787Rc1/4”
RXBF-A10/1.0Carbon steel100.1-1.064.789Rc3/8”
RXBF-A15/1.0Carbon steel150.1-1.064.794Rc1/2”
RXBF-A20/1.0-NCarbon steel200.1-1.064.7104Rc3/4”
RXBF-A20/1.0Carbon steel200.1-1.087123Rc3/4”
RXBF-A25/1.0Carbon steel250.1-1.087128Rc1”
RXBF-A32/1.0Carbon steel320.1-1.0117175Rc1 1/4”
RXBF-A40/1.0-NCarbon steel400.1-1.0117185Rc1 1/2”
RXBF-A40/1.0Carbon steel400.1-1.0137240Rc1 1/2”
RXBF-A50/1.0Carbon steel500.1-1.0167260Rc2”
RXBF-A65/1.0Carbon steel650.1-1.0177325Rc2 1/2”
RXBF-A80/0.6Carbon steel800.1-0.62254203” flanged 
RXBF-A100/0.6Carbon steel1000.1-0.62404304”flanged 
RXBF-T6/1.0PVDF60.1-1.064.782Rc1/8”
RXBF-T8/1.0PVDF80.1-1.064.787Rc1/4”
RXBF-T10/1.0PVDF100.1-1.064.789Rc3/8”
RXBF-T15/1.0PVDF150.1-1.064.794Rc1/2”
RXBF-T20/1.0-NPVDF200.1-1.064.7104Rc3/4”
RXBF-T20/1.0PVDF200.1-1.087123Rc3/4”
RXBF-T25/1.0PVDF250.1-1.087128Rc1”
RXBF-T32/1.0PVDF320.1-1.0117175Rc1 1/4”
RXBF-T40/1.0-NPVDF400.1-1.0117185Rc1 1/2”
RXBF-F6/1.0PTFE60.1-1.064.782Rc1/8”
RXBF-F8/1.0PTFE80.1-1.064.787Rc1/4”
RXBF-F10/1.0PTFE100.1-1.064.789Rc3/8”
RXBF-F15/1.0PTFE150.1-1.064.794Rc1/2”
RXBF-F20/1.0-NPTFE200.1-1.064.7104Rc3/4”
RXBF-F20/1.0PTFE200.1-1.087123Rc3/4”
RXBF-F25/1.0PTFE250.1-1.087128Rc1”
RXBF-F32/1.0PTFE320.1-1.0117175Rc1 1/4”
RXBF-F40/1.0-NPTFE400.1-1.0117185Rc1 1/2”
Other unspecified model/material/connection and DN100 above can be customized according to requirement. 
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