LDPE Solutions
McCartney Equipment & Service Solutions For The LDPE Pellets Production Industry
McCartney Products brand has been a leader in high-pressure equipment design and manufacture for over fifty years. We recognize the need for specialized, close-tolerance machining and have developed equipment and procedures to meet this demand.
Our quality-oriented facility and skilled craftsmen provide you with practical design and ultra-precision LDPE production equipment.
Supplied materials go along with international and specific standards, such as European standard EN10204. McCartney does meet latest pressure and explosion safety standards, so PED and ATEX certifications are available for every McCartney product (where applicable).
McCartney’s extensive experience in the LDPE industry is available to you. We welcome your inquiry for special problems you may have handling extreme pressures, whether you need a single part or complete system.
McCartney LDPE Process Equipment Solutions
The engineers, designers and technicians at McCartney have the experience and resources to develop innovative solutions to address your specific process equipment issues. Since the KMT Waterjet division is located at the same facility, we are able to leverage these resources and apply knowledge gained from the latest developments in ultra high pressure technology (up to 100,000 PSI!). Below are two examples of recent products developed to address specific LDPE equipment issues communicated to us by our customers.
High Flow Springless Check Valve for Initiator Pumps
Traditional initiator pump check valve designs have been characterized by significant pressure drop across the inlet checks. This pressure drop generally requires about 50 PSI of “suction pressure” to prevent cavitation of the pump with typical initiator fluids. In recent years, LDPE process changes have led to the use of initiator fluids with significantly higher vapor pressure. In order to keep the process fluids in the liquid phase, high suction pressures and cooling jackets have been utilized. Even with these actions there have still been concerns about potential pump cavitation while operating in high flow rate conditions.
To address these concerns a new McCartney initiator check valve design has been developed to dramatically reduce the pressure drop across the valve.
Key Design Features:
- 0.188” ball seat orifice diameter
- High flow ball cage design
- Lightweight ceramic check balls
- All stainless steel components (except check balls)
- Ball return springs not required
- Will run in either horizontal or vertical orientation
- Direct replacement for previous McCartney designs (no piping modifications required)
Cut-away View of High Flow Springless Check Valve
(KMT Part #20491975)
Premium HP Needle Valve Development
Manual HP needle valves are standard equipment found in many process piping locations. In critical areas, a valve failure will require shutdown of the reaction to make a repair resulting in significant loss of production. KMT has applied design technology from our 100,000 PSI “PRO” series valves to offer a premium packing option for our 66,000 PSI needle valves. The packing design in this valve utilizes chevron shaped rings that increase the number of sealing surfaces and provide a self energizing effect to extend the service life of the valve beyond that of valves with traditional “disc” type packing. This packing option, designated as “-03” is available in any 66,000 PSI valve configuration.
Cutaway of LDPE High Pressure Needle Valve
9/16 HP Valve, 2-Way Straight, 66 KSI MAWP
(KMT Part #10078889-03)
