Valves

  • Gate Valves
  • Globe Valves
  • Check Valves
  • Ball Valves
  • Butterfly Valves
  • Plug Valves

Gate Valve:

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This involves detailed pre-construction planning crucial to successful construction and on-time delivery, and allows the client and team a clear pathway to the bidding process, construction phase, and through to completion.

Typical Application:

  • Petroleum Industry (oil & gas, air, heavy liquids, gases, etc)
  • Pipe Lines
  • Most liquids
  • High temperature applications

Advantages:

  • High Capacity
  • Tight cut off
  • Low cost
  • Application to many different fluid services
  • Very low friction loss
  • Frequent on/off services

Material:

Cast Iron, Ductile iron, Cast carbon steel, Gun Metal, Stainless Steel, Alloy steels, Forged Steels

Globe Valve:

While similar in shape (outer shell) to a Gate Valve, Globe valves are more often used in cases where a flow needs to be regulated in a pipe line; this can be regulated by the percentage of the opening. Globe Valves can be easily adjusted to determine the percentage of the flow allowed, ranging anywhere from 1% to 100%.This allows the handler to have very specific control as to how much flow is allowed through.

Typical Application:

  • Flow regulation (liquid, vapors, gases, corrosive substances)
  • Throttling Service
  • Frequent Operation
  • Steady state systems
  • Applications where frequent fluctuation in pressure drop are common

Advantages:

  • Very efficient throttling capabilities
  • Precise control of flow
  • Availability in multiple ports

Material:

Metallic alloys, Carbon Steel, Forged Steel, Cast Iron

Check Valves

The typical function of a Check valve is to allow fluids (or gas) to flow in one direction. Check valves have two openings in the internal body; one to allow fluid in, and the other to simply release fluid. They usually do not have someone operator as it’s considered an “automatic’ valve as it opens with the forward flow, and ends up closing with a reverse flow. The most common types of Check Valves used today are lift, butterfly, swing, and stop and tilting disk

Typical Applications:

  • Pumps (fluids, water)
  • Industrial process (chemical, power plants)
  • Domestic use such as city water lines (to prevent back flow

Advantages:

  • Prevent backflow
  • Inexpensive
  • Avoid draining when systems are shut off
  • Minimize “water hammer” effect
  • Reliable
  • Self-operated

Material:

Steel, Bronze, Plastic, etc

Ball Valves:

A ball valve is usually operated by turning a handle in order to control flow. The standard ball valve has a quarter-turn rotational motion which typically opens or closes the flow. Typically, a ball valve uses a ball shaped disk to either start or stop the flow. In order to allow flow, the ball swivels until the hole inside of the ball is aligned with the valve body. On other hand, in order to stop flow, the ball hole needs to be perpendicular to the flow opening of the valve body.

Typical Applications:

  • Air, liquid, and gas
  • Drains & vents
  • Steam
  • Liquids with solids

Advantages:

  • Quick control of flow (on/off)
  • Low maintenance and cost
  • Capable of high capacity
  • Quick quarter turn on-off operation
  • Tight seal

Material:

Metallic’s, seats are usually constructed using Neoprene, Teflon, and other materials

Butterfly Valves:

A typical Butterfly Valve is used to manage the flow through a circular pipe or tube. While butterfly valves function in a similar fashion to a ball valve, the main difference between the two is that a butterfly valve uses a metal disc as opposed to a ball in order to maintain flow. When the lever is rotated to shut off flow, the metal disc is turned a quarter-turn until it completely restricts passage. The opposite happens when the lever is rotated the other way in order to allow passage of liquid, gas, air, steam, etc.

Typical Applications:

  • Air, liquid, gas, steam
  • Water and waste treatment
  • Agricultural fields
  • Fire protection
  • High pressure steam & water services

Advantages:

  • Tight closing seal
  • Less expensive
  • Compact design
  • Quick operation (open/close quickly)
  • Very precise
  • Reliable and require very little maintenance

Material:

Cast iron, ductile iron, aluminum, carbon steel, stainless steel and other metals

Plug Valves

A plug valve is quarter-turn rotational valve that has a cylindrical shaped internal plug that can be rotated inside the valve body to control flow. The inner part of the valve is usually referred to as the plug. The inside plug is controlled using an external handle to position it depending on the required control of fluid going through the valve.

Typical Applications:

  • Gas, vapor, and air services
  • Natural gas piping systems
  • Oil piping systems
  • High pressure applications

Advantages:

  • Quick on/off operation
  • Low resistance for flow
  • Compact design / Light weight
  • Sealing surface not exposed
  • Extremely tight shut off
  • Easy operation

Material:

steel, alloy steel, stainless steel, cast iron, etc.