Plastic Valve

Back Pressure/Relief Valves

As a back pressure valve, installed in-line downstream of a pump, the back pressure below the metering pump is maintained. When installed in the branch of a tee the valve is a pressure relief valve. The valve stays closed until inlet pressure reaches the set pressure which is adjusted by turning the spring tensioning bolt. Inlet pressure acts upward against the piston allowing excess pressure to flow upwards through the orifice.

Setting pressures for 1/2" to 2" from 5psi to 150 psi; for 2-1/2" & 3" from 7.5 psi to 150 psi and for 4" from 7.5 psi to 90 psi. Select range in PVC, Polypropylene or PVDF bodies. The SB 12 series have a built in check valve function.

back presure relief valveSB 12 Series Back Pressure / Relief Valves, PVC Bodies
SB 12 Series Back Pressure / Relief Valves, PP Bodies
SB 12 Series Back Pressure / Relief Valves. PVDF Bodies


For SB 12 Series

SB17 Series Miniature Back Pressure/Relief Valves

Compact low cost versions of the SB12 Series. PVC or PP bodies, 1/4in and 3/8 in sizes. setting pressure from 7psi to 150 psi.

back pressure relief valveSB17 Series Miniature Back Pressure/Relief Valves




For SB 17 Series


SR 50 Series Pressure Regulating Valves

Pressure Regulating (Reducing) Valves. SR 50 Series Pressure Regulating (Reducing) Valves maintain a set downstream pressure independently of a higher pressure upstream.

plastic pressure regulating valvesSR 50 Pressure Regulating (Reducing) Valves, PVC Body
SR 50 Pressure Regulating (Reducing) Valves, PP Body
SR 50 Pressure Regulating ( Reducing) Valves. PVDF Body



For SR 50 Series

Ball Valves, Wafer Check Valves

large plastic ball valvesLarge Size 4" & 6" Ball Valves




valve actuatorsPneumatic Actuators and Electric Actuators




WP Wafer Check Valves WP Series Wafer Check Valve is a non-return valve ideal for limited space installations.

wafer check valveWafer Check Valves 2" to 12" sizes. PVC
Wafer Check Valves, 2" to 12" sizes, Polypropylene
Wafer Check Valves, 2" to 12", PVDF



For WP Series Wafer Check Valves

PW Wafer Check Valves This wafer check valve does not require a separate spacer or flange gaskets. The large orifice and full flow design means low pressure drop. Spring assisted disc closure is standard as well as an optical indication of disc open/close position.

pw series wafer check valvesPW Series Wafer Check Valves. PVC
PW Series Wafer Check Valves. Polypropylene Bodies
PW Series Wafer Check Valves. Glass Filled Polypropylene Bodies
PW Wafer Check Valves PVDF Bodies


For PW Wafer Check Valves

Flow Meters, Plastic Valves & Gauge Isolators

Variable Area Flow Meters. Ideal for plastic piping systems, they provide a combination of accurate flow measurement and clear flow indication from a distance. The units must be installed vertically with the flow upwards. Tube materials are available in clear PVC, Polyamide(PA), Polysulfone(PSU) and PVDF. The flow meters are accurate to ±3% of indicated value and ±1% of full scale

flow metersCompact Variable Area Flow Meters, 3/8" to 1/2"
Compact Variable Area Flow Meters 3/4" to 1"
Full Size Variable Area Flow Meters, 1" to 1-1/4"
Full Size Variable Area Flow Meters, 1-1/2" to 2-1/2"



For Variable Area Flow Meters


flow meters with magnetic floatsCompact Flow Meters, 3/8in to 1/2 in with Magnetic Floats
Compact Flow Meters 3/4in & 1in with Magnetic Floats
Full Size Flow Meters 1" to 1-1/4in with Magnetic Floats
Full Size Flow Meters, 1-1/2in to 2-1/2in with Magnetic Floats



For Flow Meters with Magnetic Floats


air release valves Air Release (Venting) Valves AR SeriesAir Release (venting) Valve allow gases to escape from un pressurized pipe lines. As the un pressurized air vents, liquid rises to the float (an inverted cup), which lifts the float up against the seat, holding liquid pressure. The float will not release until the pressure on the inlet side of the valve is equal to the outlet pressure of the valve (normally atmospheric).
PVC Air Release (Venting) Valves 1/2in to 1in
PVC Air Release Valves 1-1/4in to 3in



For AR Series Air Release Valve


metering ball valveMetering Ball ValvesSM Series ball valves are designed for exact dosing of neutral and aggressive clean fluids. 1/2in and 3/4in sizes; PVC or Polypropylene bodies.
Plastic Metering Ball Valves 1/2in and 3/4in




For SM Series Metering Ball Valves


diaphragm valvesDiaphragm Valves, Pneumatic and Manually Operated. 700 Series plastic diaphragm valves with PVC, CPVC, PP and PVDF bodies. Diaphragms in EPDM, Viton or Teflon. A range of sizes and ends from 1/2in to 4in is available. Call or for specifications, availablity and prices




gauge isolator
SG Series Gauge Isolators Gauge Isolators SG Series Gauge Isolators allow inexpensive pressure gauges, or any other pressure instrument to be used in corrosive services. The upper chamber (gauge side) is filled with a stable fluid such as glycerine‡. A diaphragm separates it from the lower chamber which receives the media under pressure. The 1/2" gauge connection allows use of the popular 4" and 4-1/2" diameter gauges.



For SG Series Gauge Isolators