Valves - NOSHOK
Industrial valves control, regulate, isolate, and direct the flow of liquids, gases, steam, slurries, and other process media. From simple shutoff applications to precise flow control and pressure protection, selec...
Categories from NOSHOK (2)
Needle Valves
Needle valves are essential for controlling fluid flow with high precision in industrial and commercial applications. These valves feature a small, tapered stem that allows for fine adjustments, making them ideal for systems that require accurate flow regulation. Commonly used in industries such as chemical processing, oil and gas, water treatment, and instrumentation, needle valves help maintain efficiency and process stability.
Types of Needle Valves
Centro offers a variety of needle valves designed to meet different application requirements, including:
- Standard needle valves for general-purpose flow control in low- to medium-pressure systems.
- High-pressure needle valves built for demanding applications with extreme pressure conditions.
- Instrumentation needle valves for precise flow adjustments in analytical and laboratory settings.
Choosing the Right Needle Valve
Selecting the appropriate needle valve depends on factors such as system pressure, temperature, fluid type, and required flow control precision. Consider whether the valve needs to handle gases or liquids, as well as the level of adjustability required for your application.
Browse our selection of needle valves online or contact our team for expert assistance in choosing the right solution for your system.
Valve Accessories
Valve accessories are additional components that enhance the functionality and performance of valves in fluid control systems. These accessories are designed to provide other features, improve safety, or simplify maintenance of the valves. Valve accessories enhance the reliability, efficiency, and safety of valve operations, making them essential for various industries such as oil and gas, chemical processing, water treatment, and power generation.
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Available in block, single flange, or double flange connection for remote or direct installationDesigned for use with differential pressure transmitters incorporating two isolation valves and an equalizing valve in differential pressure measurement100% helium leak tested to 1 x 10-4 ml/s for guaranteed performance and reliability
$280.40$344.22
Should ship between 10 Nov and 17 Nov
Subject to factory lead times
Designed for use with differential pressure transmitters incorporating two isolation valves, two equalizing valves and a vent valve required in natural gas applicationsFlare Pattern™ valve configuration provides maximum clearance for fingers during operationSoft tip valves feature a patented Acetal non-rotating soft tip stem, and a back-up metal-to-metal seal (U.S. Patent 6,820,857)
$310.18$380.77
In Stock (28)Ships within 1 business day
Designed for use with differential pressure transmitters incorporating two isolation valves, two equalizing valves and a vent valve required in natural gas applicationsFlare Pattern™ valve configuration provides maximum clearance for fingers during operationSoft tip valves feature a patented Acetal non-rotating soft tip stem, and a back-up metal-to-metal seal (U.S. Patent 6,820,857)
$383.10$470.28
In Stock (47)Ships within 1 business day
Designed for use with differential pressure transmitters incorporating two isolation valves, two equalizing valves and a vent valve required in natural gas applicationsFlare Pattern™ valve configuration provides maximum clearance for fingers during operationSoft tip valves feature a patented Acetal non-rotating soft tip stem, and a back-up metal-to-metal seal (U.S. Patent 6,820,857)
$355.78$436.76
In Stock (67)Ships within 1 business day
Designed for use with differential pressure transmitters incorporating two isolation valves, two equalizing valves and a vent valve required in natural gas applicationsFlare Pattern™ valve configuration provides maximum clearance for fingers during operationSoft tip valves feature a patented Acetal non-rotating soft tip stem, and a back-up metal-to-metal seal (U.S. Patent 6,820,857)
$428.70$526.27
In Stock (73)Ships within 1 business day
Combines isolating and venting in a single valve, eliminating the need for tubing and fittingsBlock valve isolates the downstream process fluids and the bleed valve exhausts upstream fluids enabling static pressure transmitters, switches or gauges to be removed without disturbing the permanent piping installationBlock valve is located on the right and the bleed valve is located on top in a 90º orientation, venting is to the left
$314.11$385.61
In Stock (56)Ships within 1 business day
Combines isolating and venting in a single valve, eliminating the need for tubing and fittingsBlock valve isolates the downstream process fluids and the bleed valve exhausts upstream fluids enabling static pressure transmitters, switches or gauges to be removed without disturbing the permanent piping installationBlock valve is located on the right and the bleed valve is located on top in a 90º orientation, venting is to the left
$215.36$264.38
In Stock (68)Ships within 1 business day
Combines isolating and venting in a single valve, eliminating the need for tubing and fittingsBlock valve isolates the downstream process fluids and the bleed valve exhausts upstream fluids enabling static pressure transmitters, switches or gauges to be removed without disturbing the permanent piping installationValves are located on the top to fit into compact spaces and two holes are provided for mounting, venting is to the left
$314.09$385.58
In Stock (46)Ships within 1 business day
Compact design is ideal for installations with limited space, such as behind panels or in cabinetsDesigned for use with differential pressure transmitters incorporating two isolation valves and an equalizing valve in differential pressure measurement100% helium leak tested to 1 x 10-4 ml/s for guaranteed performance and reliability
$281.94$405.26
In Stock (48)Ships within 1 business day
Combines isolating and venting in a single valve, eliminating the need for tubing and fittingsBlock valve isolates the downstream process fluids and the bleed valve exhausts upstream fluids enabling static pressure transmitters, switches or gauges to be removed without disturbing the permanent piping installationValves are located on the top to fit into compact spaces and two holes are provided for mounting, venting is to the left
$215.36$264.38
In Stock (20)Ships within 1 business day
Slotted bolt holes allow for 2-1/8" and 2-1/4" bolt spacingsDesigned to reinforce the entire installation by shifting radial-stress load away from the NPT connectionsOptional dielectric barrier creates a non-conductive shield between the instrument and the orifice fitting
$419.14$514.53
In Stock (6)Ships within 1 business day
Slotted bolt holes allow for 2-1/8" and 2-1/4" bolt spacingsDesigned to reinforce the entire installation by shifting radial-stress load away from the NPT connectionsOptional dielectric barrier creates a non-conductive shield between the instrument and the orifice fitting
$457.51$561.65
In Stock (6)Ships within 1 business day
Slotted bolt holes allow for 2-1/8" and 2-1/4" bolt spacingsDesigned to reinforce the entire installation by shifting radial-stress load away from the NPT connectionsOptional dielectric barrier creates a non-conductive shield between the instrument and the orifice fitting
$409.73$502.98
Available for Purchase
Subject to factory lead times
Slotted bolt holes allow for 2-1/8" and 2-1/4" bolt spacingsDesigned to reinforce the entire installation by shifting radial-stress load away from the NPT connectionsOptional dielectric barrier creates a non-conductive shield between the instrument and the orifice fitting
$347.85$427.03
In Stock (125)Ships within 1 business day
Slotted bolt holes allow for 2-1/8" and 2-1/4" bolt spacingsDesigned to reinforce the entire installation by shifting radial-stress load away from the NPT connectionsOptional dielectric barrier creates a non-conductive shield between the instrument and the orifice fitting
$386.28$474.21
In Stock (125)Ships within 1 business day
Block valve can be installed on either side of stabilized body, allowing 1/2 turn installationSlotted bolt holes allow for 2-1/8" and 2-1/4" bolt spacingsDesigned to reinforce the entire installation by shifting radial-stress load away from the NPT connections0.375" bore for unrestricted passage of process gas
$610.49$749.44
Should ship between 10 Nov and 17 Nov
Subject to factory lead times
Block valve can be installed on either side of stabilized body, allowing 1/2 turn installationSlotted bolt holes allow for 2-1/8" and 2-1/4" bolt spacingsDesigned to reinforce the entire installation by shifting radial-stress load away from the NPT connections0.375" bore for unrestricted passage of process gas
$648.91$796.60
Should ship between 10 Nov and 17 Nov
Subject to factory lead times
Slotted bolt holes allow for 2-1/8" and 2-1/4" bolt spacingsDesigned to reinforce the entire installation by shifting radial-stress load away from the NPT connectionsOptional dielectric barrier creates a non-conductive shield between the instrument and the orifice fitting
$284.48$349.22
In Stock (69)Ships within 1 business day
Slotted bolt holes allow for 2-1/8" and 2-1/4" bolt spacingsDesigned to reinforce the entire installation by shifting radial-stress load away from the NPT connectionsOptional dielectric barrier creates a non-conductive shield between the instrument and the orifice fitting
$310.33$380.95
In Stock (69)Ships within 1 business day
Slotted bolt holes allow for 2-1/8" and 2-1/4" bolt spacingsDesigned to reinforce the entire installation by shifting radial-stress load away from the NPT connectionsOptional dielectric barrier creates a non-conductive shield between the instrument and the orifice fitting
$270.65$332.25
In Stock (14)Ships within 1 business day
Slotted bolt holes allow for 2-1/8" and 2-1/4" bolt spacingsDesigned to reinforce the entire installation by shifting radial-stress load away from the NPT connectionsOptional dielectric barrier creates a non-conductive shield between the instrument and the orifice fitting
$252.91$310.47
In Stock (69)Ships within 1 business day
Block valve can be installed on either side of stabilized body, allowing 1/2 turn installationSlotted bolt holes allow for 2-1/8" and 2-1/4" bolt spacingsDesigned to reinforce the entire installation by shifting radial-stress load away from the NPT connections0.375" bore for unrestricted passage of process gas
$390.94$479.91
In Stock (51)Ships within 1 business day
Block valve can be installed on either side of stabilized body, allowing 1/2 turn installationSlotted bolt holes allow for 2-1/8" and 2-1/4" bolt spacingsDesigned to reinforce the entire installation by shifting radial-stress load away from the NPT connections0.375" bore for unrestricted passage of process gas
$416.77$511.62
In Stock (51)Ships within 1 business day
Available in block, single flange, or double flange connection for remote or direct installationDesigned for use with differential pressure transmitters incorporating two isolation valves and an equalizing valve in differential pressure measurement100% helium leak tested to 1 x 10-4 ml/s for guaranteed performance and reliability
$280.40$344.22
Should ship between 10 Nov and 17 Nov
Subject to factory lead times
Designed for use with differential pressure transmitters incorporating two isolation valves, two equalizing valves and a vent valve required in natural gas applicationsFlare Pattern™ valve configuration provides maximum clearance for fingers during operationSoft tip valves feature a patented Acetal non-rotating soft tip stem, and a back-up metal-to-metal seal (U.S. Patent 6,820,857)
$310.18$380.77
In Stock (28)Ships within 1 business day
Designed for use with differential pressure transmitters incorporating two isolation valves, two equalizing valves and a vent valve required in natural gas applicationsFlare Pattern™ valve configuration provides maximum clearance for fingers during operationSoft tip valves feature a patented Acetal non-rotating soft tip stem, and a back-up metal-to-metal seal (U.S. Patent 6,820,857)
$383.10$470.28
In Stock (47)Ships within 1 business day
Designed for use with differential pressure transmitters incorporating two isolation valves, two equalizing valves and a vent valve required in natural gas applicationsFlare Pattern™ valve configuration provides maximum clearance for fingers during operationSoft tip valves feature a patented Acetal non-rotating soft tip stem, and a back-up metal-to-metal seal (U.S. Patent 6,820,857)
$355.78$436.76
In Stock (67)Ships within 1 business day
Designed for use with differential pressure transmitters incorporating two isolation valves, two equalizing valves and a vent valve required in natural gas applicationsFlare Pattern™ valve configuration provides maximum clearance for fingers during operationSoft tip valves feature a patented Acetal non-rotating soft tip stem, and a back-up metal-to-metal seal (U.S. Patent 6,820,857)
$428.70$526.27
In Stock (73)Ships within 1 business day
Combines isolating and venting in a single valve, eliminating the need for tubing and fittingsBlock valve isolates the downstream process fluids and the bleed valve exhausts upstream fluids enabling static pressure transmitters, switches or gauges to be removed without disturbing the permanent piping installationBlock valve is located on the right and the bleed valve is located on top in a 90º orientation, venting is to the left
$314.11$385.61
In Stock (56)Ships within 1 business day
Combines isolating and venting in a single valve, eliminating the need for tubing and fittingsBlock valve isolates the downstream process fluids and the bleed valve exhausts upstream fluids enabling static pressure transmitters, switches or gauges to be removed without disturbing the permanent piping installationBlock valve is located on the right and the bleed valve is located on top in a 90º orientation, venting is to the left
$215.36$264.38
In Stock (68)Ships within 1 business day
Combines isolating and venting in a single valve, eliminating the need for tubing and fittingsBlock valve isolates the downstream process fluids and the bleed valve exhausts upstream fluids enabling static pressure transmitters, switches or gauges to be removed without disturbing the permanent piping installationValves are located on the top to fit into compact spaces and two holes are provided for mounting, venting is to the left
$314.09$385.58
In Stock (46)Ships within 1 business day
Compact design is ideal for installations with limited space, such as behind panels or in cabinetsDesigned for use with differential pressure transmitters incorporating two isolation valves and an equalizing valve in differential pressure measurement100% helium leak tested to 1 x 10-4 ml/s for guaranteed performance and reliability
$281.94$405.26
In Stock (48)Ships within 1 business day
Combines isolating and venting in a single valve, eliminating the need for tubing and fittingsBlock valve isolates the downstream process fluids and the bleed valve exhausts upstream fluids enabling static pressure transmitters, switches or gauges to be removed without disturbing the permanent piping installationValves are located on the top to fit into compact spaces and two holes are provided for mounting, venting is to the left
$215.36$264.38
In Stock (20)Ships within 1 business day
Slotted bolt holes allow for 2-1/8" and 2-1/4" bolt spacingsDesigned to reinforce the entire installation by shifting radial-stress load away from the NPT connectionsOptional dielectric barrier creates a non-conductive shield between the instrument and the orifice fitting
$419.14$514.53
In Stock (6)Ships within 1 business day
Slotted bolt holes allow for 2-1/8" and 2-1/4" bolt spacingsDesigned to reinforce the entire installation by shifting radial-stress load away from the NPT connectionsOptional dielectric barrier creates a non-conductive shield between the instrument and the orifice fitting
$457.51$561.65
In Stock (6)Ships within 1 business day
Slotted bolt holes allow for 2-1/8" and 2-1/4" bolt spacingsDesigned to reinforce the entire installation by shifting radial-stress load away from the NPT connectionsOptional dielectric barrier creates a non-conductive shield between the instrument and the orifice fitting
$409.73$502.98
Available for Purchase
Subject to factory lead times
Slotted bolt holes allow for 2-1/8" and 2-1/4" bolt spacingsDesigned to reinforce the entire installation by shifting radial-stress load away from the NPT connectionsOptional dielectric barrier creates a non-conductive shield between the instrument and the orifice fitting
$347.85$427.03
In Stock (125)Ships within 1 business day
Slotted bolt holes allow for 2-1/8" and 2-1/4" bolt spacingsDesigned to reinforce the entire installation by shifting radial-stress load away from the NPT connectionsOptional dielectric barrier creates a non-conductive shield between the instrument and the orifice fitting
$386.28$474.21
In Stock (125)Ships within 1 business day
Block valve can be installed on either side of stabilized body, allowing 1/2 turn installationSlotted bolt holes allow for 2-1/8" and 2-1/4" bolt spacingsDesigned to reinforce the entire installation by shifting radial-stress load away from the NPT connections0.375" bore for unrestricted passage of process gas
$610.49$749.44
Should ship between 10 Nov and 17 Nov
Subject to factory lead times
Block valve can be installed on either side of stabilized body, allowing 1/2 turn installationSlotted bolt holes allow for 2-1/8" and 2-1/4" bolt spacingsDesigned to reinforce the entire installation by shifting radial-stress load away from the NPT connections0.375" bore for unrestricted passage of process gas
$648.91$796.60
Should ship between 10 Nov and 17 Nov
Subject to factory lead times
Slotted bolt holes allow for 2-1/8" and 2-1/4" bolt spacingsDesigned to reinforce the entire installation by shifting radial-stress load away from the NPT connectionsOptional dielectric barrier creates a non-conductive shield between the instrument and the orifice fitting
$284.48$349.22
In Stock (69)Ships within 1 business day
Slotted bolt holes allow for 2-1/8" and 2-1/4" bolt spacingsDesigned to reinforce the entire installation by shifting radial-stress load away from the NPT connectionsOptional dielectric barrier creates a non-conductive shield between the instrument and the orifice fitting
$310.33$380.95
In Stock (69)Ships within 1 business day
Slotted bolt holes allow for 2-1/8" and 2-1/4" bolt spacingsDesigned to reinforce the entire installation by shifting radial-stress load away from the NPT connectionsOptional dielectric barrier creates a non-conductive shield between the instrument and the orifice fitting
$270.65$332.25
In Stock (14)Ships within 1 business day
Slotted bolt holes allow for 2-1/8" and 2-1/4" bolt spacingsDesigned to reinforce the entire installation by shifting radial-stress load away from the NPT connectionsOptional dielectric barrier creates a non-conductive shield between the instrument and the orifice fitting
$252.91$310.47
In Stock (69)Ships within 1 business day
Block valve can be installed on either side of stabilized body, allowing 1/2 turn installationSlotted bolt holes allow for 2-1/8" and 2-1/4" bolt spacingsDesigned to reinforce the entire installation by shifting radial-stress load away from the NPT connections0.375" bore for unrestricted passage of process gas
$390.94$479.91
In Stock (51)Ships within 1 business day
Block valve can be installed on either side of stabilized body, allowing 1/2 turn installationSlotted bolt holes allow for 2-1/8" and 2-1/4" bolt spacingsDesigned to reinforce the entire installation by shifting radial-stress load away from the NPT connections0.375" bore for unrestricted passage of process gas
$416.77$511.62
In Stock (51)Ships within 1 business day
FAQS
- Use a ball valve for simple on/off shutoff, a control valve when you need to regulate flow rate or pressure, and a check valve to prevent backflow. The choice comes down to whether you need to stop flow, control it, or protect against reverse flow.
- Cv is the flow coefficient — how much water a valve passes at a given pressure drop. Full port means the valve opening matches the pipe diameter for unrestricted flow; regular port is slightly smaller. End connections describe how the valve connects to pipe (NPT threads, flanges, etc.). Body material determines compatibility with your media and environment — brass, stainless, and PVC are the most common.
- Start with your required Cv based on flow rate and pressure drop. Then confirm the valve's pressure and temperature ratings exceed your system's maximums. Undersizing causes excessive pressure drop; oversizing reduces control precision. Always size for your actual operating conditions, not system maximums.
- Fail-open means the valve opens if power or signal is lost; fail-closed means it closes — critical for safety applications. NPT is a threaded connection best for smaller pipes and lower pressures. Flanged connections bolt between pipe flanges and are preferred for larger pipes, high pressure, or applications requiring frequent removal.
- Ball valves use a rotating ball for fast quarter-turn shutoff and are ideal for frequent operation. Gate valves use a rising gate for full open/close and are better for infrequent operation where minimal flow restriction matters. Ball valves are generally more reliable, longer lasting, and easier to operate.
- Because no single valve works well in every application. Pressure, temperature, media type, flow control needs, pipe size, and safety requirements all vary dramatically across industries. Each valve type is engineered to solve a specific set of those problems efficiently.
- Ball valves offer tighter shutoff and are better for smaller lines or where zero leakage matters. Butterfly valves are lighter, more compact, and more cost-effective for larger diameter pipes. For high-volume water flow in large lines, butterfly valves are typically the practical choice.
- Look for stainless steel or carbon steel body construction, graphite or metal seat materials, and valves rated for your specific pressure-temperature combination. Globe valves and ball valves with metal seats are commonly used in high-temp applications. Always verify the valve's published P-T rating before specifying.
- Match the valve type to your application (shutoff, control, or check). Verify body material compatibility with your media. Confirm pressure and temperature ratings exceed operating conditions. Consider end connection type, actuation method, and maintenance requirements. When in doubt, over-specify on pressure rating rather than under.