The check-Q-meter valve type FD 16 is mainly known for its function of regulating flow. Huade Hydraulic valves type FD 16 are compatible with Rexroth products. The fact is that Huade Hydraulic has had two long-term cooperation with Rexroth. The factory pays more attention to cost-effectiveness and practicality. The factory has a strict testing system and advanced production equipment from all over the world to ensure the stable performance of the product.
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Operating pressure, ports A, X (MPa) |
to 31.5 |
|
Operating pressure. port B (MPa) |
to 42 |
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Pilot pressure, port X (flow control range) (MPa) |
min.2to3.5, max.31.5 |
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Cracking pressure, A to B (MPa) |
0.2 |
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Setting pressure for secondary pressure relief valve (MPa) |
to 40 |
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Flow (L/min) |
80 (size12) 200 (size16) |
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Area ratio of the pre-opening |
poppet seat area/area of pilot spool=1/20 |
|
Pressure fluid temperature range(℃) |
-30 to+80 |
|
Viscosity range(mm ²/s) |
10 to 800 |
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Pressure fluid |
Mineral oil(for NBR seal),or phosphate ester(for FPM seal) |
Features:
▶ Porting pattern to DIN 24 340, from D,ISO 5781 and CETOP - RP 121H
▶ Pilot operated check valve, leak-free. The check-Q-meter controls the returning flow Q2 in relation to the flow being directed into the opposite side of the actuator Q1 with cylinders the area ratio ( Q2=Q1φ ) has to be taken into account.
▶ By-pass valve, free-flow in opposite direction
▶ Optional built-in secondary pressure relief valve (only for valve with flange connections).
Application:
The main function of check-Q-meters valves FD16 is to influence the speeds of hydraulic motors and cylinders independent of the load (prevents running away). In addition there is an isolated function for pipe burst safety.
The check-Q-meter comprises basically of the housing (1), main poppet (2), pilot part(3), pilot spool (4), damping spool(5) and pilot damping (6).
Structure of Check-Q-Meter Valve FD 16
Symbol of Check-Q-Meter Valve FD 16
Circuit examples
Note:
Two check-Q-meters cannot be used to control two cylinders which are forced mechanically to move together, as synchronization and the same pressure cannot be guaranteed in each cylinder.
Therefore, the cylinders have to be equipped with two pilot operated check valves, type SL.The check-Q-meter is fitted in a common line.
In this case, the load pressure must not exceed 20MPa!
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No. 27, Yangsha Road, Huilong Town, Qidong City, Jiangsu Province, China
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