Pilot-to-shift directional valves
and proportional throttles
Pilot-shifted 3-way and 4-way directional cartridges
(models DD*G and DD*C)
Sun pilot-shifted 3- and 4-way directional valves can be used in hydraulic system circuits requiring directional control of double- and single-acting cylinders, hydraulic motors, brakes and clutches. These cartridges are pilot shifted and may be controlled with any type of adequate hydraulic pilot supply.
These directional valves are available in Series 2, 3 and 4 frame sizes with nominal flow rates of 20 to 80 gpm (75 to 300 L/min). Maximum operating pressures are 5000 psi (350 bar) at all ports.
Sun offers two basic configurations of pilot-operated 3- and 4-way directional valves:
- Spring-centered 4-way, 3-position directional cartridges
- Spring-biased 3-way, 2-position directional cartridges
Several spool options are available in each type.
Pilot-shifted 3-way and 4-way proportional directional cartridges (models FT*H and FT*C)
Sun pilot-shifted 3- and 4-way proportional directional valves offer infinite proportional control where flow requirements are higher than the capacity of direct-operated solenoid versions. They offer the convenience of remote controllability with varying capacities ranging from 7 gpm (28 L/min) to 80 gpm (320 L/min).
These proportional directional valves are available in Series 2, 3 and 4 frame sizes. Maximum operating pressures are 5000 psi (350 bar) at all work ports, and 500 psi (35 bar) at the pilot ports.
Sun offers two basic configurations of pilot-operated 3- and 4-way proportional directional valves:
- Spring-centered 4-way, 3-position, proportional directional cartridges
- Spring-centered 3-way, 3-position (selector) proportional directional cartridges with center bleed-down function
Pilot-shifted 2-way normally closed proportional throttle cartridges (models FT*A)
Sun pilot-shifted, 2-way normally closed, dual-path proportional throttle valves offer infinite proportional control where flow requirements are higher than the capacity of direct-operated solenoid versions. They offer the convenience of remote controllability with varying capacities from 15 gpm (60 L/min) to 50 gpm (200 L/min). These proportional directional valves are available in Series 2 and 3 frame sizes. Maximum operating pressures are 5000 psi (350 bar) at all work ports, and 500 psi (35 bar) at the pilot ports.
These proportional throttle valves are available with two options:
- Stroke adjustment to limit maximum flow (L control)
- Position switch to provide confirmation that the valve is closed (Z control)
Product Offering:
| Function | Symbol | Nominal Capacity | Cartridge Model |
Cavity |
|---|---|---|---|---|
| 2-Pos. 3-Way Spring-Biased Directional Valve |
 |
20 gpm (80 L/min) 40 gpm (160 L/min) 80 gpm (320 L/min) |
DDDG DDFG DDHG |
T-52A T-53A T-54A |
| 3-Pos. 4-Way Spring-Centered Directional Valve |
 |
20 gpm (80 L/min) 40 gpm (160 L/min) 80 gpm (320 L/min) |
DDDC DDFC DDHC |
T-52A T-53A T-54A |
| 3-Pos. 3-Way Spring-Centered Proportional Directional Valve with Center Bleed-Down |
 |
7 gpm (28 L/min) 18 gpm (70 L/min) 15 gpm (60 L/min) 35 gpm (145 L/min) 80 gpm (320 L/min) |
FTCH FTDH FTEH FTFH FTHH |
T-52A T-52A T-53A T-53A T-54A |
| 3-Pos. 4-Way Spring-Centered Proportional Directional Valve |
 |
7 gpm (28 L/min) 18 gpm (70 L/min) 15 gpm (60 L/min) 35 gpm(145 L/min) 80 gpm (320 L/min) |
FTCC FTDC FTEC FTFC FTHC |
T-52A T-52A T-53A T-53A T-54A |
| 2-Pos. 2-Way Spring-Biased Dual-Path Proportional Throttle |
 |
15 gpm (60 L/min) 30 gpm (120 L/min) 25 gpm (95 L/min) 50 gpm (200 L/min) |
FTCA FTDA FTEA FTFA |
T-52AD T-52AD T-53AD T-53AD |
Sun offers flexible delivery schedules to satisfy any required ship date. We invite you to contact your Sun distributor to learn more about available delivery options.
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