Oil and Gas

Are You Experiencing Erratic Service Life From Your Fracking Plungers?

This may be caused by the centerless grinding of either your new or re-built fracking plunger. The ground wear surface is not necessarily concentric to the clamping end. The result is vibration and uneven operation which can lead to scoring of the side of the
fracking plunger. We have rebuilt fracking plungers that were as much as .015" out of concentricity with the clamping end. Our solution is to hold the clamping end while finishing the coated surface of the fracking plunger. This mimics the way that the fracking plunger is actually held in the pump.

Parkway Kew offers two different fused coating options for fracking plungers. The standard nickel chrome coating is PK-62. In the harshest conditions, the longest fracking plunger life can be obtained by using PK-730 tungsten carbide.

Wire Drawing

Parkway-Kew Corp. is a full service supplier of hardsurfaced wire drawing blocks or capstans and is recognized as the world leader in this field. The cutting edge HVOF, plasma, metallizing and submerged arc coating technologies are used to improve the wear and corrosion resistance of many process parts. Tuner rolls, sheaves, step cones and various guide devices are prime candidates for hard coating to minimize the down time associated with frequent change out.

In the 1950's Parkway-Kew Corp. pioneered the use of submerged arc welding for the rebuilding and hardsurfacing of wire drawing blocks. Submerged arc welding is still considered the premier method and most cost effective method for hardsurfacing wire drawing blocks. PK-503 has its characteristic cracked appearance caused by heat checking of the super hard alloy. In some cases, the cracked surface may be detrimental to the quality of the wire. In these instances, PK-200 (a sub arc alloy of the same hardness, but lesser chemistry) is used on steel sleeves or steel blocks because it will deposit virtually crack free.

Later, Parkway-Kew Corp. introduced the use of fuse welding for wire drawing rings used to draw copper and aluminum. PK-920, PK-700, and PK-675 are the industry standards in this field. They offer a viable lower cost alternative to solid ceramics without the potential breakage or slippage problems inherent in solid ceramics.
In the early 80's, Parkway-Kew added the metallizing capability at the request of some of its customers. The primary alloy used with this method of hardsurfacing is PK-400. It is very forgiving and provides the highest quality surface finish to the wire being drawn. It is not the most wear-resistant alloy, but it can be the most practical. And in the case of very large wire, it is the only successful type of hardsurfacing.

In 1989, Parkway-Kew introduced the first HVOF (high velocity oxygen fuel) coating for a wire drawing block. HVOF is a hardsurfacing process where the alloy powder is expelled from a spray gun at speeds that can exceed Mach 2 and the powder impinges on the substrate and then builds up on itself. It forms a hard dense coating which is virtually defect free. A wide variety of coatings can be applied with the HVOF system, with the four primary ones for wire drawing blocks being PK-920, PK-675, PK-700 and PK-750. PK-920 is a nickel chrome boron alloy, while the others use that alloy as a matrix to hold increasing percentages of hard tungsten carbide.

In the late 90's, Parkway-Kew introduced the plasma sprayed ceramic coated block. This method has proven very cost effective for high speed and high slip ferrous wire drawing applications, especially for small high quality or plated wires. PK-1500 chrome oxide is the most wear resistant ceramic utilized for wire drawing blocks.

Parkway-Kew's most recent innovation for wire drawing blocks has been the Restore & Grind process. Normally, a regrind of a worn block needs to go all the way down to the bottom of the deepest groove (typically the drawline area). This results in the removal of a significant amount of perfectly good coating, and a larger reduction in block diameter. Through extensive R&D, Parkway Kew developed a process that can successfully fill in only the drawline area and seamlessly blend it in with the original coating. Due to the enhanced thickness with which the PK coatings are applied, it is possible to get lower cost Restore & Grind repairs 5-7 times before it becomes necessary to put on an entirely new coating.

Shipping Terminals

We manufacture and rebuild replacement trolley festoon wheels.

Geared Forged Rope Pulley re-built with PK-200 to exceed original life of OEM supplied hardened pulleys