Valves & Actuation
Marquest Throttle Master: Manually Actuated - PP \ PTFE
SKU
NA-250-PPR
Pipe Size
1/4 IN
Connection Type
Threaded
Price
$67.09
SKU
NA-375-PPR
Pipe Size
3/8 IN
Connection Type
Threaded
Price
$67.09
SKU
NA-500-PPR
Pipe Size
1/2 IN
Connection Type
Threaded
Price
$72.09
Produced in two styles: Globe pattern (straight 180°) and Angle pattern (90°). NSF standard 14 & 61 compliant, FDA, USDA and USP standards met or exceeded. Fine metering control, excellent linearity of flow. No elastomer (O-rings) metals or lubricants. Working pressures to 250 psi @ 70°F.
Marquest Throttle Master: Manually Actuated - PP \ PTFE
SKU
NG-250-PPR
Pipe Size
1/4 IN
Connection Type
Threaded
Price
$67.09
SKU
NG-375-PPR
Pipe Size
3/8 IN
Connection Type
Threaded
Price
$67.09
SKU
NG-500-PPR
Pipe Size
1/2 IN
Connection Type
Threaded
Price
$72.09
Marquest Scientific’s complete line of Throttle Master™ Needle Valves provide precise control with fine adjustment of corrosive and high purity fluids. The developed metering chamber provides for the most reliable stabilization and linearity of flow. Produced in two styles: Globe pattern (straight 180°) and Angle pattern (90°). Needle finish, SPI/SPE No. 1. Bubble tight, low torque shutoff, long term performance. NSF standard 14 & 61 compliant, FDA, USDA and USP standards met or exceeded. Needle stem is PTFE sealed for excellent chemical resistance
Marquest Throttle Master: Manually Actuated - PVC \ PTFE
SKU
NA-250-PVC
Pipe Size
1/4 IN
Connection Type
Threaded
Price
$60.64
SKU
NA-375-PVC
Pipe Size
3/8 IN
Connection Type
Threaded
Price
$60.64
SKU
NA-500-PVC
Pipe Size
1/2 IN
Connection Type
Threaded
Price
$68.49
Produced in two styles: Globe pattern (straight 180°) and Angle pattern (90°). NSF standard 14 & 61 compliant, FDA, USDA and USP standards met or exceeded. Fine metering control, excellent linearity of flow. No elastomer (O-rings) metals or lubricants. Working pressures to 250 psi @ 70°F.
Marquest Throttle Master: Manually Actuated - PVC \ PTFE
SKU
NG-250-PVC
Pipe Size
1/4 IN
Connection Type
Threaded
Price
$60.64
SKU
NG-375-PVC
Pipe Size
3/8 IN
Connection Type
Threaded
Price
$60.64
SKU
NG-500-PVC
Pipe Size
1/2 IN
Connection Type
Threaded
Price
$68.49
Marquest Scientific’s complete line of Throttle Master™ Needle Valves provide precise control with fine adjustment of corrosive and high purity fluids. The developed metering chamber provides for the most reliable stabilization and linearity of flow. Produced in two styles: Globe pattern (straight 180°) and Angle pattern (90°). Needle finish, SPI/SPE No. 1. Bubble tight, low torque shutoff, long term performance. NSF standard 14 & 61 compliant, FDA, USDA and USP standards met or exceeded. Needle stem is PTFE sealed for excellent chemical resistance
Plast-O-Matic BSDA Series: Air-Operated Diaphragm Valve Fail Close Normally Closed - PVC \ PTFE
SKU
BSDA025T-NC-PV
Pipe Size
1/4 IN
Connection Type
Threaded
Diaphragm Material
PTFE
Price
$328.50
SKU
BSDA075T-NC-PV
Pipe Size
3/4 IN
Connection Type
Threaded
Diaphragm Material
PTFE
Price
$429.30
SKU
BSDA150T-NC-PV
Pipe Size
1 1/2 IN
Connection Type
Threaded
Diaphragm Material
PTFE
Price
$694.80
SKU
BSDAM050T-NC-PV
Pipe Size
1/2 IN
Connection Type
Threaded
Diaphragm Material
PTFE
Price
$399.60
SKU
BSDAM100T-NC-PV
Pipe Size
1 IN
Connection Type
Threaded
Diaphragm Material
PTFE
Price
$526.50
Air-Operated Diaphragm
Series BSDA miniature air-operated diaphragm valves are designed for pressure applications with highly-corrosive or ultra-pure liquid systems when space is critical. The valve is ideal for a broad range of industrial applications, from electronics to chemical plants, commercial laundries, car wash operations etc. The standard valves are air pressure-to-open with spring return-to-close. Liquid line pressure assists in opening the valve. Not designed for vacuum service.
Normally-Closed Operation
A 3-way air solenoid valve connection to the 1/8" NPT port is required to actuate the diaphragm valve. When air pressure (40 to 100 psi) is applied, the diaphragm valve opens and, when removed, spring force closes the valve.
Materials of Construction
With the series BSDA air-operated diaphragm valves, the standard diaphragm material is a combination of PTFE on the wetted side backed up with Viton® for strength and flexibility. Body materials available are PVC, CPVC, Polypropylene, PVDF and Teflon®.
The upper air section is always PVC.