Demay manufactures only one product, the HD-500 Triplex Pump. All major components for the HD-500 are built and machined in house. We have full traceability on all parts.

Analysis of technical features of the Demay HD-500

  1. The power end frame is made of high strength steel with heavy fabricated center bearing carriers that are integral.
  2. The bronze bull gear is rated at 550 HP continuous- duty by Cleveland Gear Co. It is mounted directly over the large Timken roller bearing giving it maximum support for load capacity. The gear and steel pinion have a ratio of 8.0:1.
  3. The plunger is a one-piece self-aligned designed to reduce misalignment.It is QPQ coated 56 Rockwell C for maximum lubricity and corrosion resistance power end seals are double lipped for retention of gear oil as well as reducing chances of water, dirt, or other foreign materials getting into the power end. The packing system is the updated CDI WSP system. It incorporates improved materials that lower friction, increase the temperature and media ranges and extend the life of drilling and well service packing. The Demay packing is good for -50 degrees F to +300 degrees F. The header ring is internally lubricated and uses HNBR material that offers improved media and abrasion resistance. The pressure ring is made from Peek material which gives maximum extrusion resistance.
  4. Demay uses four main bearings. The outer bearings are large bore Timken- type roller bearings designed to give maximum radial load while providing over 50,000 lbs. of thrust load from each bearing. The center two bearings are large bore cylindrical bearings used to stabilize the crankshaft under high loads.
  5. Our crankshaft is made of alloy forged steel which is heat treated, stress relieved, and machine balanced.
  6. Connecting rods are forged, machined, aircraft aluminum. They are drilled for internal lubrication to the wrist pin.
  7. Crossheads are made from heat treated alloy castings. The guides are replaceable high grade bronze to insure long lasting wear characteristics which are lubricated by the power end‘s internal lube system.
  8. There are three individual fluid-ends. This is a time tested system which allows repairs in the field when necessary. Each fluid-end is made of high alloy, fine grain forged, and heat treated steel. All metal parts are QPQ coated for maximum lubricity and corrosion resistance. All internal rubber parts are HNBR, valves springs are ASTM 313 stainless steel. The fluid-ends are attached by the exclusive Demay x-spacers that keep contaminants from reaching the power end. Fluid-ends are available for plungers from 3 3/8”, 4”, 4 ½”, 5”, to 6” Pressures range from 6,250 to 20,000 PSI.

Demay International uses the latest CNC machining technology in all manufacturing processes

 

 

 

  

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