RHINOGATE COMPARISON

Comparison between a Rhinogate Knife Gate Valve and a pop in sleeve style knife gate valve



CASE STUDY 1 - FAILURE DUE TO HARDENING OF SLEEVE MATERIAL



TYPICAL RUBBER "POP IN SLEEVE" STYLE KNIFE GATE VALVE

 

RHINOGATE KNIFE GATE VALVE




 


MODE OF FAILURE:

 

RHINOGATE ADVANTAGE:

• When these types of valves remain in their closed position for extended periods of time - either in stock or installed in-line - heat and pressure can cause the valves rubber sleeves to loose their elastic memory and over time can lead to hardening of the sealing faces. This hardening hinders the sleeves ability to return to its intended sealing shape and typically results in a gap between the two rubber sleve's sealing faces causing a leak path.

  • The Rhinogate Knife Gate Valve incorporates a full bore design where all fluid media is contained within the one piece liner.
• As atmospheric leakage occurs - external atmospheric elements can cause the slurry to harden, resulting in a build-up of hard solid slurry which can jam the gate and prevent its closure.

  • Rhinogate Knife Gate Valves are 100% leak free.

• These type of valves typically have a drip tray or basin that requires constant maintenance. Constant seepage of slurry to atmosphere during cycling is typical with these types of valves.   • No drip tray or catch basins are required with the Rhinogate Knife Gate Valve.




CASE STUDY 2 - FAILURE DUE TO GATE DEFORMATION



TYPICAL RUBBER "POP IN SLEEVE" STYLE KNIFE GATE VALVE

 

RHINOGATE KNIFE GATE VALVE




 


MODE OF FAILURE:

 

RHINOGATE ADVANTAGE:

• Due to their split sleeve design, "pop in sleeve" style knife gate valves typically incorporate very thin gates. Pressure, heat and water hammer can deform the gate over time. In abrasive applications, wear will also deterioate the edges of the gate leaving it jagged, sharp and bent.

  • Rhinogate Knife Gate Valves incorporate thick, robust gates - usually between 1.5 and 2 times thicker than "pop in sleeve" style knife gate valves. Extra added thickness prevents deformation from water hammer and pressure.
• When seating, due to its split sleeve design, deformation of the gate can lead to shearing and tearing of the rubber pop in sleeves - resulting in leakage to atmosphere.

  • Rhinogate Knife Gate Valves' thick gates and full bore design eliminates any chance of shearing or tearing to its liner during seating.







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