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Series Q156

The Quality Series Q156 uses an offset union bonnet pattern with a renewable seat. This type of valve can also be used as a quick closing valve and offers back seating to protect the packing. Another important feature is the renewable seat, which allows the user to replace fresh seating for this valve.

The simplest and least costly method of liquid level indication is the tubular gauge glass. Quality has a variety of designs available. All series use transparent vertical tubes with their lowest visible point connected to the tank or boiler at the lowest level required. The top of the glass may be open to the atmosphere if the tank is open or to the unfilled part of a closed vessel above or at the highest level permitted. Isolating valves are placed above and below the gauge glass connections.

Quality has slow closing valves and also valves with quick closing connections, where a one quarter turn of the valve spindle will allow the valve to change from the fully open to the fully closed position. Quality uses different valve spindles that are fitted with levers which allow chains to be attached in order to operate the valves from ground level. Quality drain valves or cocks may also be installed below the gauge glass for flushing to remove any solid material that may be collected.

Due to the constant supervision needed for many tanks and pressurized vessels, a broken tubular gauge glass can cause excessive amounts of liquids to escape. To prevent such occurrences, Quality equips the lower Tubular Valve with a protection shutoff. This device is the stainless steel ball which closes off the fluid channel when the tubular glass is broken. When the tubular glass breaks, the unexpected rush of liquid through the valve will force the ball against the valve opening. With this type of safety shutoff the valve often requires more maintenance.  Another type of protection supplied by Quality is the Metal Shield. This device uses metal rods or shield to protect the tubular glass from breaking, it also protects the operator from debris should breakage occur.

The applications of tubular gauge glass are limited to lower pressure and temperatures. Many of the applications that use this type of valve system are non-toxic and non-hazardous materials. For tubular glass gauges exceeding 700 mm in length, Quality suggests using more valves to contain the operation.

Common Features Q156 Valves.

  • 3/4 inch or ½ inch, or flanged, union or non-union connections
  • ¾ inch or ½ inch drain connections
  • ¾” inch tubular glass
  • Glass gland is designed to prevent torque on the tube.
  • Ball check automatically stops flow in the event of tube breakage
  • Four guard rods with a holder to protect glass. (available in plastic and steel)
  • Offset body pattern to allow cleaning of tube by drain plug removal.
  • Renewable seating
  • Stainless steel trim
  • Sleeve construction allows both quick closing and back seating to protect packing

Important dimensions:

  • Visible glass: center to center minus 5-5/8”
  • Tubular glass length: center to center minus 2-3/8”
  • Guard Rods Length: center to center minus 2-3/8”

Series Q156 Support Files

Series Q156 Model

 

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