Valve Manufacturers and Types

HELPING YOU FIND

INDUSTRIAL VALVES

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OUR PREMIER BRANDS, ALWAYS IN STOCK

We can help you find valves for any industrial, energy or commercial application. And as a Master Stocking Distributor for some of the leading valve manufacturers, we're always prepared to get you the valve you need, when and where you need it.

OUR BRANDS

aloyco
air-torque
center-line
crane-valve
duo-chek
flowseal
pacific-valves
ladish-valves
xomox
nibco
stockham
walworth
pbv
dsi
quadrant
durco
edward-valve
vogt-valve
mccanna
powell-valves
flowserve-automax
worcester-controls
nordstrom-valves

VALVE TYPES

Products-Angle Valve

ANGLE VALVES

An angle valve is essentially a globe valve within which the flow makes a 90-degree turn. It’s a linear motion valve designed primarily to stop, start and regulate pressure. They contain a disk capable of completely closing the flowpath or being totally removed from the flowpath altogether.

Angle valves also feature a stem that can move up or down to regulate the flow within the valve, and they provide for a 90-degree change in flow direction, eliminating the use of extra fittings and elbows.

TYPICAL APPLICATIONS INCLUDE:
  • High-point vents and low-point drains when leak tightness and safety are major considerations
  • Feed water, chemical feed, condenser air extraction and extraction drain systems
  • Boiler vents and drains, main steam vents and drains and heater drains
  • Turbine seals and drains
ADVANTAGES:
  • Ideal for regulating flow
  • Suitable for flashing and cavitation, with the ability to prevent valve from being damaged
  • Helpful in solving issues general-purpose valves may have difficulty addressing
  • Allows for the application of different materials to trip parts for special needs
Products-Ball Valve

BALL VALVES

Ball valves are quarter-turn rotational motion valves that use a ball-shaped control element to stop or start flow. They are available in different configurations, most commonly floating ball and trunnion-mounted ball valves.

TYPICAL APPLICATIONS INCLUDE:
  • Air, gaseous and liquid applications
  • Drains and vents in liquid, gaseous and other
  • Fluid services
  • Steam service
ADVANTAGES:
  • Quick, quarter-turn on-off operation
  • Tight sealing with low torque
  • Smaller in size than most other valves
Products-Butterfly Valve

BUTTERFLY VALVES

Butterfly valves are quarter-turn rotational motion valves that use a round disk control element to stop or start flow. Common butterfly valve body types include wafer, lug and flanged-end designs.

TYPICAL APPLICATIONS INCLUDE:
  • Cooling water, air, gases, fire protection, etc.
  • Slurry and similar services
  • Vacuum service
  • High-pressure and high-temperature water and steam services
ADVANTAGES:
  • Compact design, requiring less space than other valves
  • Light in weight
  • Quick operation requires less time to open or close available in very large sizes
  • Low-pressure drop and high-pressure recovery
Products-Check Valve

CHECK VALVES

Check valves are self-operated valves that open with forward flow and close with reverse flow. The pressure of the fluid passing through a system opens the valve, while any reversal of flow will close the valve. Exact operation will vary depending on the type of check valve mechanism.

TYPICAL APPLICATIONS INCLUDE:
  • Prevention of backflow or siphoning
  • Keeping media streams separate, such as flow into a header
  • Protecting other equipment such as pumps, turbines and tanks
COMMON TYPES INCLUDE:
  • Swing
  • Tilting-disk
  • Piston
  • Ball valves
  • Butterfly valves
Products-Gate Valve

GATE VALVES

Gate valves are primarily designed to start or stop flow. In service, these valves are generally either fully open or fully closed. They are available with different disks or wedges, including: solid wedges, flexible wedges and split wedges (self-adjusting and self-aligning to both seats’ sides).

TYPICAL APPLICATIONS INCLUDE:
  • When a straight-line flow of fluid and minimum restriction is desired
  • Often used in the oil industry because of their ability to cut through liquids
ADVANTAGES:
  • Good shutoff features
  • Minimal pressure loss through the valve
  • Gate valves are bidirectional
Products-Globe Valve

GLOBE VALVES

Globe valves are linear motion valves. Although they get their name from their spherical body shape, globe valves can often look very similar to check valves from the outside.

Because these valves are primarily designed to stop, start and regulate flow, they contain a disk capable of completely closing the flow path or being totally removed from the flow path altogether. They’re also designed with a stem that can move up or down to regulate the flow within the valve.

Conventional globe valves may be used for isolation, throttling and pressure-reducing services. These valves commonly come in three primary body designs: tee pattern or z-body, wye pattern or y-body and angle pattern.

TYPICAL APPLICATIONS INCLUDE:
  • Cooling water systems where flow needs to be regulated
  • Fuel oil systems where flow is regulated and leak prevention is of importance
  • High-point vents and low-point drains when leak prevention and safety are major considerations
  • Feedwater, chemical feed, condenser air extraction and extraction drain systems
  • Boiler vents and drains, main steam vents and drains and heater drains
  • Turbine seals and drains, as well as turbine lube oil systems
ADVANTAGES:
  • Good shutoff capability
  • Moderate to good throttling capability
  • Shorter stroke (compared to a gate valve)
  • Available in tee, wye and angle patterns, each offering unique capabilities
  • Easy to machine or resurface seats
  • Application as stop-check valve when disc not attached to the stem
Products-Pneumatic Control Valve

PNEUMATIC CONTROL VALVE ACTUATORS

A pneumatic actuator mainly consists of a piston or a diaphragm which develops the motive power. It keeps the air in the upper portion of the cylinder, allowing air pressure to force the diaphragm or piston to move the valve stem or rotate the valve control element.

OPERATION

Valves require little pressure to operate and usually double or triple the input force. The larger the size of the piston, the larger the output pressure can be. Having a larger piston can also be good if air supply is low, allowing the same forces with less input. These pressures are large enough to crush objects in the pipe. On 100 kPa input, you could lift a small car (upwards of 1,000 lbs) easily, and this is only a basic, small pneumatic valve. However, the resulting forces required of the stem would be too great and cause the valve stem to fail.

This pressure is transferred to the valve stem, which is connected to either the valve plug (see plug valve), butterfly valve, etc. Larger forces are required in high-pressure or high-flow pipelines to allow the valve to overcome these forces, and move the valve’s moving parts to control the material flowing inside.

INPUT

The valve’s input is the "control signal." This can come from a variety of measuring devices, and each different pressure is a different set point for a valve. A typical standard signal is 20–100 kPa. For example, a valve could be controlling the pressure in a vessel which has a constant out-flow, and a varied in-flow (varied by the actuator and valve).

MEASUREMENT

A pressure transmitter will monitor the pressure in the vessel and transmit a signal from 20–100kPa. A reading of 3320 kPa means there is no pressure; 100 kPa means there is full range pressure (can be varied by the transmitter's calibration points). As the pressure rises in the vessel, the output of the transmitter rises. This increase in pressure is sent to the valve, which causes the valve to stroke downward and start closing the valve, decreasing flow into the vessel and reducing the pressure in the vessel as excess pressure is evacuated through the out flow. This is called a direct acting process.

TYPICAL APPLICATIONS INCLUDE:
  • Tie rod cylinders
  • Rotary actuators
  • Grippers
  • Rodless actuators with magnetic linkage or rotary cylinders
  • Rodless actuators with mechanical linkage
  • Pneumatic artificial muscles
  • Specialty actuators that combine rotary and linear motion—frequently used for clamping operations
  • Vacuum generators
ADVANTAGES OVER ELECTRIC ACTUATORS:
  • Higher closing forces
  • Faster closing speeds
  • Easily fine-tuned
  • Lower cost per unit
  • No ignition source required
  • Great for pumps, engines and other flammable environments

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