Valves - AQ Matic and Control Valves
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...
Diaphragm valves are designed to regulate the flow of liquids and gases by using a flexible diaphragm to create a secure seal. These valves are ideal for applications where the transported media is corrosive, abrasive, or requires sanitary handling. Their simple yet effective design minimizes the risk of contamination, making them widely used in industries such as chemical processing, pharmaceuticals, food and beverage, and water treatment.
Centro offers a comprehensive selection of diaphragm valves in manual and pneumatic actuated designs to suit various operational needs. Whether you require precise hand-operated flow control or an automated valve for high-efficiency processing, we have the right solution.
Types of Diaphragm Valves We Offer
- Manual Diaphragm Valves – Hand-operated for precise control in low-pressure systems
- Pneumatic Actuated Diaphragm Valves – Use compressed air for automated on/off operation
- Weir-Type Diaphragm Valves – Provide excellent sealing for corrosive and particulate-laden fluids
- Straight-Through Diaphragm Valves – Offer minimal flow resistance for high-purity applications
- Sanitary Diaphragm Valves – Designed for hygienic industries, including food, beverage, and pharmaceuticals
Why Choose Diaphragm Valves from Centro?
- Superior sealing performance for corrosive, abrasive, and sanitary applications
- Available in a variety of materials, including stainless steel, plastic, and lined options
- Suitable for industries such as chemical processing, pharmaceuticals, biotechnology, and water treatment
- Sourced from trusted manufacturers to ensure durability, reliability, and compliance with industry standards
Centro provides high-quality diaphragm valves designed for long-lasting performance. Browse our selection and order online today, or contact our team for expert assistance in selecting the right valve for your application.
Valve repair kits and parts are essential components used to maintain and repair valves in fluid control systems. These kits typically include seals, gaskets, o-rings, springs, and other necessary parts needed to restore or replace worn or damaged elements of a valve. Valve repair kits and parts enable the repair and refurbishment of valves, extending their lifespan and ensuring proper functioning. By using these kits, operators can quickly and cost-effectively address valve issues without requiring complete valve replacement. These kits are available for different types and sizes of valves, allowing for specific repairs tailored to the valve's design and requirements. Valve repair kits and parts are essential for industries such as manufacturing, petrochemicals, water treatment, and HVAC, where reliable valve performance is crucial.
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.
$456.74$553.78
Subject to factory lead times
$454.18$550.67
Subject to factory lead times
$454.18$550.67
Subject to factory lead times
$639.26$775.08
Subject to factory lead times
$790.89$958.93
Subject to factory lead times
$1,305.30$1,582.64
Subject to factory lead times
$181.25$219.76
Subject to factory lead times
$184.19$223.32
Subject to factory lead times
$245.20$297.29
Subject to factory lead times
$417.97$506.77
Subject to factory lead times
$454.18$550.67
Subject to factory lead times
$639.26$775.08
Subject to factory lead times
$218.25$264.62
Subject to factory lead times
$259.82$315.02
Subject to factory lead times
$218.25$264.62
Subject to factory lead times
$260.39$315.71
Subject to factory lead times
$319.06$386.85
Subject to factory lead times
$702.78$852.10
Subject to factory lead times
$56.02$67.92
Subject to factory lead times
$59.60$72.26
Subject to factory lead times
$81.57$98.90
Subject to factory lead times
$94.13$114.12
Subject to factory lead times
$125.51$152.17
Subject to factory lead times
$174.02$210.99
Subject to factory lead times
$456.74$553.78
Subject to factory lead times
$454.18$550.67
Subject to factory lead times
$454.18$550.67
Subject to factory lead times
$639.26$775.08
Subject to factory lead times
$790.89$958.93
Subject to factory lead times
$1,305.30$1,582.64
Subject to factory lead times
$181.25$219.76
Subject to factory lead times
$184.19$223.32
Subject to factory lead times
$245.20$297.29
Subject to factory lead times
$417.97$506.77
Subject to factory lead times
$454.18$550.67
Subject to factory lead times
$639.26$775.08
Subject to factory lead times
$218.25$264.62
Subject to factory lead times
$259.82$315.02
Subject to factory lead times
$218.25$264.62
Subject to factory lead times
$260.39$315.71
Subject to factory lead times
$319.06$386.85
Subject to factory lead times
$702.78$852.10
Subject to factory lead times
$56.02$67.92
Subject to factory lead times
$59.60$72.26
Subject to factory lead times
$81.57$98.90
Subject to factory lead times
$94.13$114.12
Subject to factory lead times
$125.51$152.17
Subject to factory lead times
$174.02$210.99
Subject to factory lead times
- 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.