Mars Series 77 Ball Valve

Mars Series 77 Ball Valve

The Mars Ball Valve series 77 is a is a fully maintainable Three Piece Ball Valve with reinforced PTFE seats/seals, a raised ISO 5211 mounting pad and square stemed top for direct actuation. Ends can be specified as BSP screwed or socket weld, other end types are available, Body Seats and Seals are easy to replace or maintain in your pipeline without the need for complete disassembly, simply by dropping the swing out body centre section. Valve comes with lockable lever supplied as standard.


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Product Description

The Mars Ball Valve has a blow out proof stem and an antistatic device between the stem and body and stem and ball. The high cycle life stem design is accomplished by a double sealing system. The 45° Pyramidal Segment Ring in conjunction with a seal that fits on top of the Pyramidal segment provides the primary seal. Most of the media in the pipeline is contained by this seal. As a precautionary measure a V ring chevron packing provides the secondary sealing. On top of the stem is a set of Belleville washers that automatically adjusts compression to the seal to compensate for wear, pressure or temperature fluctuations.

Key features:

  • Available in Screwed BSP, Socket Weld, But Weld or NPT, sizes: 1/4″ to 4″.
  • Temperature range: -20 °C to 200°C.
  • Operating pressure: 1000 PSI.
  • Insulated grip, lockable lever handle.
  • Movement: 90° turn.
  • Low Torque.

Body Constuction: Two piece full bore body
Body: CF8M (DIN 1.4408) stainless steel
Temperature: -60°F (-51°C) to 420°F (215°C).
Pressure: 1/4″ – 2″ 1000 psi (69 bar)
Ball & Stem 316 stainless steel.

The above specification is for the valve body, the specification of the reinforced PTFE seats will vary. Maximum pressure will decrease as the temperature increases up to a maximum temperature of 420°F (215°C).