D*1FP Servo Valves Enhance Large Hydraulic Systems

Parker Hannifin has brought out the D*1FP range of pilot-operated servo proportional valves. These are based on the company's direct-operated DFplus hydraulics control valve, which features Parker's Voice Coil Drive (VCD) technology. The VCD is based on the same principle used to vibrate loudspeaker diaphragms. Parker is using it to control the high forces within hydraulic valves.

By producing dynamics on a par with modern servo valves, the VCD technology results in a much simpler valve structure. The new pilot-operated D*1FP series has transferred the advantages of the VCD to larger frame sizes and higher flow-rate valves. The high dynamics and precision of each new pilot valve deliver optimum control of the main spool, resulting in servo-class performance from the complete valve. The control behaviour of the valves ensures high stability in operation and easy, time-saving installation and set-up.

Whether in the direct or pilot-operated valves, the VCD technology offers the same benefits of robust design and long life. A new safety concept with the pilot valve can also reduce the need for additional shut-off valves in hydraulics systems. It ensures the main stage is hydraulically balanced at power down and the main spool is in a safe position.

The D*1FP range is available in four sizes: NG10 (CETOP05), NG16 (CETOP07), NG25 (CETOP08) and NG32 (CETOP10). With flow rates of up to 3000 litres a minute, the valves bring the advantages of VCD technology to almost any size of hydraulics system and are supported around the world by Parker's global network of manufacturing, sales and customer-support centres.

Comments

Post a Comment

Popular posts from this blog

What is Class I Division 2?

Image
A Class I Division 2 is a location: (1) In which volatile flammable gases, flammable liquid-produced vapors, or combustible liquid-produced vapors are handled, processed, or used, but in which the liquids, vapors, or gases will normally be confined within closed containers or closed systems from which they can escape only in case of accidental rupture or breakdown of such containers or systems or in case of abnormal operation of equipment, or (2) In which ignitable concentrations of flammable gases, flammable liquid-produced vapors, or combustible liquid-produced vapors are normally prevented by positive mechanical ventilation, and which might become hazardous through failure or abnormal operation of the ventilating equipment. Class I Division 2 Classification Class I Division 2 refers to the ANSI/ISA 12.12.01 standard. This standard was previously UL1604 until UL recommended the newer ANSI/ISA standard be used and that all hazardous location products be certified under this standa
Read more

FUSE SIZING CONSIDERATIONS FOR HIGHER EFFICIENCY MOTORS

Image
When selecting the proper fuse for short circuit protection in motor starting applications, it is important to not only ensure that the fuse will not nuisance open during motor start up times, but also that the fuse will coordinate as required with overload relays. When sizing fuses between 125% and 150% of the motor nameplate current, several advantages, including ease of coordination with an overload device, a smaller disconnect, and increased short circuit protection from a lower fuse rating, can be achieved. However, if sizing at this level prevents the motor from starting, it may then be necessary to increase the fuse ampere rating and it then becomes important to know the NEC sizing limitations. As of June 1, 2016, the US Department of Energy has mandated that newly manufactured electric motors will need to meet NEMA Premium® efficiency standards. As motor efficiencies increase, motor locked rotor currents can also be expected to increase. In addition to this, with across-the-lin
Read more

7/8 16UN Connectors that Provide 600 Volts and 15 Amps

TURCK announces new A-Size 3 and 4-pin 7/8 16UN powerfast™ connectors that provide up to 600 Volts and 15 Amps of power. These IP67 rated connectors provide a modular wiring system designed to handle high current applications for machine power distribution, while providing resistance to vibration commonly associated with conveyors, motors and material handling applications. The cordsets are available with a tray rated, exposed run PVC flexlife ® cable, with or without STOOW rating, and 14 AWG wires that allow you to replace hard wiring with a robust, quick disconnect system that saves the time and money spent installing a conduit system. The A-Size powerfast line offers male and female, straight connectors, standard and custom lengths, and pigtails or extensions. To make the system complete, fully encapsulated mating receptacles, with 1/2”-14 NPT mounting threads are available.
Read more