The pilot operated 2-way high response valves series TDP provide a precise control of high flows at maximum dynamics. Typical applications for these slip-in cartridge proportional throttle valves are die cast, injection molding and hydraulic presses.
Parker’s 2-way high response valves series TDP
are particularly suitable for demanding controlled and closed loop
applications where high flow has to be precisely controlled at
highest dynamics.
The proportional throttle valves have a 2-stage design consisting of
a DFplus pilot valve and a main stage with poppet and LVDT. With the
DFplus pilot valve the TDP achieves extremely fast response times:
from 10.5 ms (NG25) up to 28 ms (NG100) with an accuracy of <0.1 %
of the nominal flow. The pilot valve actively controls the poppet –
independent of the pressure conditions in the main ports. The
integrated electronics in the pilot of the TDP has two control loops
for the main poppet and the pilot spool.
Markets:
• Industrial
• Molding
Features/Benefits:
• High precision – for high quality products, minimum scrap rate and
long machine lifetime
• Extremely fast step response – shortens material processing and
thus cycle times
• Short delivery time – no warehousing necessary
• Active pilot operated 2-way high-response valve
• Cavity and mounting pattern according to ISO 7368
• Flow direction B to A and A to B
• Completely mounted and adapted unit with integrated electronics
• Fail save position in case of electrical and/or hydraulic power
down
• In order to ensure the closed position, pilot pressure is
required.
• 8 sizes NG25 up to NG100
Applications:
• Die cast
• General presses
• Injection molding
Please note:
It is basically required that the pilot pressure is at the level of
the system pressure. At low system pressure the pilot pressure
should be min. 140 bar, when high valve dynamics are desired.