| Terminology | Description | Shop Online |
| Valves | A valve is a mechanical device that controls the flow of a fluid (gases, liquids, fluidised solids, or slurries) by opening, closing, or partially obstructing various passageways. | Valves |
| Actuators | A mechanism that operates a valve from a remote location, using power sources like electric, hydraulic, or pneumatic energy. | Actuators |
| Ball Valve | A valve that uses a spherical disc to control flow. It is opened when the ball's hole is in line with the flow and closed when it is pivoted 90-degrees. | Ball Valve |
| Butterfly Valve | A valve with a disc that rotates around a central axis, controlling flow with minimal pressure drop. | Butterfly Valve |
| Check Valve | A valve that allows flow in one direction only, preventing backflow. | Check Valve |
| Diaphragm | A valve that controls flow by utilising a flexible diaphragm, which can be operated manually or with an actuator. | Diaphragm |
| V-Port Valve | A ball valve featuring a 'V'-shaped ball or seat, which enables more precise flow control. | V-Port Valve |
| Trim Material | The particular materials utilised for the valve components (including the seat, disk, and stem) that interact with the flow medium. | Trim Material |
| Seat Leakage | Leakage across the valve seat, even when the valve is closed, is typically defined by specific standards such as ANSI/FCI or API. | Seat Leakage |
| Saftey Valve | A valve that autonomously discharges a substance from a boiler, pressure vessel, or similar system when the pressure or temperature surpasses predetermined thresholds. | Saftey Valve |
| Reduced Bore Valve | A valve with a bore diameter smaller than that of the connected piping, thereby reducing the flow. | Reduced Bore Valve |
| Quarter-turn Valve | A valve that transitions from open to closed with a 90-degree turn, like a ball valve or butterfly valve. | Quarter-turn Valve |
| Packing Gland | A component designed to hold the packing material around a valve stem, preventing leaks. | Packing Gland |
| Overpressure Protection | Devices or techniques employed to prevent systems from exceeding safe pressure limits, frequently utilising relief or safety valves. | Overpressure Protection |
| Non-return Valve | An alternative name for a check valve, which prevents reverse flow in a system. | Non-return Valve |
| NACE Standards | The National Association of Corrosion Engineers' standards are employed to select suitable materials and establish procedures to minimise corrosion in valves and other equipment. | NACE Standards |
| Manifold | A device with multiple openings that distributes or collects fluids from one or more sources to one or more destinations. | Manifold |
| Limit Switch | A device utilised to indicate when a valve has reached either its open or closed position. | Limit Switch |
| Isolation Valve | A valve designed to entirely halt the flow of fluid in a piping system, enabling maintenance or modifications to be carried out without shutting down the entire system. | Isolation Valve |
| Hard Seating | Valve seats crafted from harder materials, such as metals, are employed in high-pressure or high-temperature applications where softer seating materials would not withstand the conditions. | Hard Seating |
| Differential Pressure | The pressure differential between two points in a system, which is crucial for the functioning of specific types of valves. | Differential Pressure |
| Deadband | A range where a change in input does not affect the output, often associated with control valves and actuators. | Deadband |
| Commissioning | The procedure for guaranteeing that all systems and components of a valve are designed, installed, tested, operated, and maintained in accordance with the operational requirements of the owner or end client. | Commissioning |
| Bypass Valve | A secondary valve that redirects flow around the main valve for maintenance or flow control. | Bypass Valve |
| Back Pressure | The pressure experienced on the downstream side of a valve, which can influence its performance and flow characteristics. | Back Pressure |
| Strainer | A device that mechanically removes unwanted solids from fluid, gas, or steam lines using a perforated or mesh strainer element. | Strainer |
| Rotary Valve | A type of valve in which the closure member moves along a circular path within the flow path. | Rotary Valve |
| Pressure Balanaved Valve | A valve that ensures a stable output pressure regardless of variations in input pressure or flow. | Pressure Balanaved Valve |
| Positioner | A device that works with a control valve actuator to regulate the valve's opening and closing in response to a control signal. | Positioner |
| Pilot Valve | A small valve used to regulate a larger valve, commonly applied in safety and relief valve systems. | Pilot Valve |
| Lockout Device | A safety mechanism designed to secure a valve in a fixed position, preventing unauthorised use. | Lockout Device |
| Lift Check Valve | A check valve in which the disc rises from its seat due to gravity or flow pressure. | Lift Check Valve |
| Handwheel | The manual control mechanism on a valve is used to operate the stem and gate functions. | Handwheel |
| Flow Coefficient (CV) | A measure indicating a valve's flow capacity at a particular opening, used to compare the performance of different valves. | Flow Coefficient (CV) |
| Flange | A technique for assembling pipes, valves, pumps, and other equipment into a piping system, which includes sealing and bolting together two flanges. | Flange |
| Expansion Valve | A valve designed to decrease the pressure of refrigerants and other fluids within thermal management systems. | Expansion Valve |
| Double Block and Bleed Valve | A setup featuring two valve elements that provide a seal against pressure from both directions, with a bleed valve in between to maintain the seal's integrity. | Double Block and Bleed Valve |
| Cryogenic Valve | Valves specifically engineered for extremely low-temperature applications, including LNG and liquid nitrogen. | Cryogenic Valve |
| Control Valve | A valve designed to regulate flow rate, pressure, or other parameters, frequently automated using actuators. | Control Valve |
| Cavitation | A phenomenon in which vapor bubbles form and collapse in a fluid, possibly leading to damage to the valve. | Cavitation |
| Bonnet | The section of the valve assembly that contains the stem and packing, connected to the body. | Bonnet |
| Bleed Valve | A compact valve engineered to drain or release surplus pressure or fluid. | Bleed Valve |
| Valve Trim | The internal components of a valve that are replaceable and come into contact with the flow medium include the stem, disk, seat, and sleeve. | Valve Trim |
| Valve Stem | A compact valve intended for draining or releasing surplus pressure or fluid. | Valve Stem |
| Valve Seat | The internal surfaces of a valve that come into contact with the disc to create a leak-proof seal. | Valve Seat |
| Valve Body | The main external casing of a valve that houses the internal components or the flow channel. | Valve Body |
| Trunnion Valve | A ball valve equipped with extra support for the ball, commonly utilised in high-pressure applications. | Trunnion Valve |
| Three-way Valve | A valve that joins three ports, typically used for mixing or diverting flow paths. | Three-way Valve |
| Solenoid Valve | A valve operated electromechanically, controlled by an electric current passing through a solenoid. | Solenoid Valve |
| Pressure Relief Valve | A safety device that releases surplus pressure from a vessel or system when it exceeds safe levels. | Pressure Relief Valve |
| Plug Valve | A valve that permits fluid to pass through when open and halts the flow when the plug is rotated to obstruct it. | Plug Valve |
| Pinch Valve | A valve that regulates fluid flow using a pinching action, typically employed for slurries or liquids with solid particles. | Pinch Valve |
| Needle Valve | A valve featuring a small port and a threaded, needle-shaped plunger designed for precise flow regulation. | Needle Valve |
| Knife Gate Valve | A gate valve specifically engineered to slice through slurry or thick fluids. | Knife Gate Valve |
| Globe Valve | A valve that controls the flow in a pipeline using a movable disk or plug. | Globe Valve |
| Gate Valve | A valve that operates by raising a gate to clear the fluid's path. | Gate Valve |
