McCARTNEY LDPE PRODUCTION PARTS
HIGH PRESSURE LDPE Valve Stems, Fittings and Plungers
Valve Stems
McCartney will design and fabricate valve stems and seats in any size and for any application including on/off and modulating service. Materials will be selected per customer specifications or according to the specific application.
High Pressure Fittings Available in 1/4”, 3/8” & 9/16”
McCartney offers a complete selection of HP fittings including nominal sizes of 1/4”, 3/8”, 9/16”. McCartney enhanced designs to provide the maxium fatigue life available today and are designed with features that make them durable and reliable even in harsh environments. For example, the high pressure valves were made with heavy-duty metal handles, machined with finger grips and given higher grade stainless steel valve stems.
By purchasing high pressure LDPE parts from KMT Waterjet, you are assured of using Certified Genuine Parts that are made using the newest technology available—even if the parts are for older systems. Installing KMT Certified Genuine spare parts maintains the warranty on your McCartney LDPE Equipment and keeps it running at peak performance!
High Pressure Block Fittings
McCartney’s LDPE flanged block fittings are available in a wide range of sizes and pressure ratings up to 55,000 PSI, with higher pressure designs considered upon request.
Fittings can be designed and manufactured to comply with customer-supplied data sheets or we can manufacture to customer designs and drawings. Standard materials include forged AISI 4340, Special McCartney alloy steel forged to Spec.#43-72, forged 15-5ph stainless steel, and ASME SA723.
McCartney’s computer modeling capabilities ensure all design considerations are recognized and addressed.
Our abrasive honing process can be implemented upon request, providing 4 RMS surface finishes, eliminating stress riser concerns in small internal radius and intersecting bore areas. The standard bore surface finish is 32RMS.
When cyclic stress is a concern, fitting bores can be autofrettaged, effectively prolonging in the service life of the fitting. Autofrettage pressures are calculated based on material properties and design pressure to ensure maximum benefit.
Plungers
McCartney has full carbide plunger fabrication capabilities to grind and finish a wide variety of plungers from 250” – 4.00” (6.4 mm – 101 mm). Using Kennametal™ carbide blanks, we commonly grind and polish plunger OD surfaces to 1-2 RMS finish.
We also provide O.D. regrind and polish service for worn plungers of all sizes.
