Hydraulics

Proportional Electro-Hydraulic Pressure Control Valves. Normally-open, closed-loop pressure control controlling system pressure proportionally to input voltage, stable even at low flow. Port 3/4, sub-plate mounting. Max flow 70 L/min. Pressure adjustment range: B (0.2–7.0 MPa). Coil resistance 10Ω, supply DC24V. Hysteresis 1.5% max. Built-in fault-detection output.

Semiconductor Type Pressure Switches. Pressure setting range 0.1–35 MPa (model dependent). Open collector output (photocoupler isolated), DC 35V max 100 mA. Supply DC 10–28V, consumption ≤10 mA. Protection IP54 (standard) / IP65 (protective cover -S). Operating temp −20 to +70°C. Repeatability approx. 0.5%. Mass 175 g.

Solenoid Controlled Relief Valves. Max. operating pressure: 25 MPa. Pressure adjustment range: to 25 MPa. Max. flow: 100 L/min. Sub-plate type. Vent forms: 2B3A / 2B3B / 2B2B / 2B2 / 3C2 / 3C3. Coil (specify): AC A100/A200 (std), A120/A240 (opt); DC D24 (std), D12/D48 (opt); AC-DC R200 (std), R100 (opt). Wiring: Terminal box type (std) / DIN connector type (-N, opt). Mass 6.3–7.3 kg (single/double solenoid / shock-prevention).

Solenoid Controlled Relief Valves. Max. operating pressure: 25 MPa. Pressure adjustment range: to 25 MPa. Max. flow: 200 L/min. Sub-plate type. Vent forms: 2B3A / 2B3B / 2B2B / 2B2 / 3C2 / 3C3. Coil (specify): AC A100/A200 (std), A120/A240 (opt); DC D24 (std), D12/D48 (opt); AC-DC R200 (std), R100 (opt). Wiring: Terminal box type (std) / DIN connector type (-N, opt). Mass 7.2–8.2 kg (single/double solenoid / shock-prevention).

Solenoid Controlled Relief Valves. Max. operating pressure: 25 MPa. Pressure adjustment range: to 25 MPa. Max. flow: 400 L/min. Sub-plate type. Vent forms: 2B3A / 2B3B / 2B2B / 2B2 / 3C2 / 3C3. Coil (specify): AC A100/A200 (std), A120/A240 (opt); DC D24 (std), D12/D48 (opt); AC-DC R200 (std), R100 (opt). Wiring: Terminal box type (std) / DIN connector type (-N, opt). Mass 10.5–11.5 kg (single/double solenoid / shock-prevention).

Solenoid Controlled Relief Valves. Max. operating pressure: 25 MPa. Pressure adjustment range: to 25 MPa. Max. flow: 100 L/min. Threaded type. Vent forms: 2B3A / 2B3B / 2B2B / 2B2 / 3C2 / 3C3. Coil (specify): AC A100/A200 (std), A120/A240 (opt); DC D24 (std), D12/D48 (opt); AC-DC R200 (std), R100 (opt). Wiring: Terminal box type (std) / DIN connector type (-N, opt). Mass 6.6–7.6 kg (single/double solenoid / shock-prevention).

Solenoid Controlled Relief Valves. Max. operating pressure: 25 MPa. Pressure adjustment range: to 25 MPa. Max. flow: 200 L/min. Threaded type. Vent forms: 2B3A / 2B3B / 2B2B / 2B2 / 3C2 / 3C3. Coil (specify): AC A100/A200 (std), A120/A240 (opt); DC D24 (std), D12/D48 (opt); AC-DC R200 (std), R100 (opt). Wiring: Terminal box type (std) / DIN connector type (-N, opt). Mass 6.6–7.6 kg (single/double solenoid / shock-prevention).

Solenoid Controlled Relief Valves. Max. operating pressure: 25 MPa. Pressure adjustment range: to 25 MPa. Max. flow: 400 L/min. Threaded type. Vent forms: 2B3A / 2B3B / 2B2B / 2B2 / 3C2 / 3C3. Coil (specify): AC A100/A200 (std), A120/A240 (opt); DC D24 (std), D12/D48 (opt); AC-DC R200 (std), R100 (opt). Wiring: Terminal box type (std) / DIN connector type (-N, opt). Mass 10.3–11.3 kg (single/double solenoid / shock-prevention).

Solenoid Controlled Relief Valves (High Pressure Type). Max. operating pressure: 35 MPa. Pressure adjustment range: to 35 MPa. Max. flow: 250 L/min. Sub-plate mounting. Vent forms: 2B3A / 2B3B / 2B2B / 2B2 / 3C2 / 3C3. Coil (specify): AC A100/A200 (std), A120/A240 (opt); DC D24 (std), D12/D48 (opt); AC-DC R200 (std), R100 (opt). Wiring: Terminal box type (std) / DIN connector type (-N, opt). Mass 5.5–6.6 kg.

Solenoid Controlled Relief Valves (High Pressure Type). Max. operating pressure: 35 MPa. Pressure adjustment range: to 35 MPa. Max. flow: 500 L/min. Sub-plate mounting. Vent forms: 2B3A / 2B3B / 2B2B / 2B2 / 3C2 / 3C3. Coil (specify): AC A100/A200 (std), A120/A240 (opt); DC D24 (std), D12/D48 (opt); AC-DC R200 (std), R100 (opt). Wiring: Terminal box type (std) / DIN connector type (-N, opt). Mass 6.5–7.6 kg.

Air Bleed Valves. Attached to the pump discharge side, the valve automatically discharges air that has entered the circuit. Connection bore Rc 3/8, maximum use pressure 25 MPa, blow-off pressure 0.15 MPa, cracking pressure 0.34 MPa. Three blow-off flow ratings (2 / 5 / 10 L/min) are selected according to the pump discharge rate.

Mechanical servo valve developed by Yuken for control of machine tools, welding equipment, and similar machinery. Built on high machining precision to enable high-accuracy operation. Valve sizes 4 / 10 / 20 / 40 (rated flow). Max pressure 7 MPa. External-drain, internal-drain, and external-pilot configurations available. Order designation by RFQ / consultation.

Electro-hydraulic two-stage (nozzle-flapper) servo valve, handled through a sales alliance with Moog, widely applicable to automatic control of general industrial machinery. Long track record in position, speed, and force control requiring high output, high precision, and high response. Pilot stage uses a dry-type torque motor free from faults caused by metal particles; nozzle and flapper are protected by an internal filter; the second-stage spool and pilot stage are coupled by simple, failure-free mechanical feedback. Frequency response 120 Hz (19 L/min type, at 21 MPa). Supply pressure 1.4–21 MPa. Internal-pilot (standard) or external-pilot (E) types. Rated flow 3.8–63 L/min (ΔP=7MPa).

Throttle and Check Module. Used as pilot check valve for solenoid/pilot operated directional valves. Flow: 30 (01) / 80 (03) L/min. Max. operating pressure: 25 MPa. Gasket mounting. Meter-out (no symbol) / meter-in (-A) on size 03.

Throttle Module. Used as pilot check valve for solenoid/pilot operated directional valves. Flow: 30 (01) / 80 (03) L/min. Max. operating pressure: 25 MPa. Gasket mounting. Backflow-prevention check valve (-C) on size 03.

Standard Hydraulic Power Unit YA Pack. YUKEN's standard hydraulic power unit YA Pack was developed to meet the era's demands for resource saving, energy saving and low noise. It pursues ease of use while offering a rich range of models, so the desired model can be selected. Low noise: equipped with an A-series or AR-series variable piston pump, with careful attention to tank structure and piping, giving a low noise level and good sound quality. Energy saving / low heat generation: a high-efficiency pressure-compensated variable piston pump reduces power loss and saves power consumption. Rich product lineup: 35 models prepared by combining mounted pump, tank capacity and motor output; 21 option types including base plate assembly. A discharge-rate adjustment screw is built into all models. Standardized unit enabling short delivery. Control circuits are easily configured via optional modular valve assembly. Motor insulation class F (all models). Power supply: 50 Hz AC 200 V / 60 Hz AC 200, 220 or 230 V.

Energy-Saving Standard Hydraulic Power Unit YA-e Pack. The YA-e Pack achieves substantial energy saving by combining the pressure-compensation mechanism of a variable piston pump with a dedicated inverter controller that detects load pressure and controls the motor speed. Greatly reduced power consumption: for the E-YA37, power consumption during full cut-off operation is reduced by more than 70% compared with the conventional YA Pack. Low noise: during full cut-off the motor speed drops, greatly reducing noise. Low heat generation: for the E-YA37, the oil-temperature rise during continuous full cut-off operation is lowered by more than 20 C versus the conventional YA Pack. Equal pump discharge in 50/60 Hz regions: the maximum-discharge speed can be set arbitrarily by the inverter up to 1800 r/min regardless of supply frequency (minimum 300 r/min depending on pump suction capacity). Control circuits are easily configured. Operation is possible even if the pressure sensor or inverter fails. Power supply: 50 Hz AC 200 V / 60 Hz AC 200, 220 or 230 V.

Contami-Kit (Microscopic Inspection Device) YC-100. A portable measuring device that determines the contamination level of hydraulic fluid by comparison with standard contamination plates; the level can be obtained as a NAS1638 class (reference value). Reliable and simple to handle. Usable anywhere (portable, AC/DC switchable power). No skill is required since it compares against contamination plates. Measurement takes about 10 minutes. Records can be kept by photograph using a standard SLR camera. Options: water/glycol-fluid filter set (M-KYC-100-F-20) and 4x objective lens (KYC-100-L-20, 40x total magnification, for samples with relatively large, widely distributed contaminant particles). Separately sold parts include camera adapter, vacuum pump kit, filter/glass bottles, funnel, clamp, stand, spare bulb, filter set and cleaning solution. Note: the cleaning solution (KYC-100-N-20) is a flammable substance and cannot be handled for transport by air or ship - purchase solvent locally.

Low-Noise Compact Type Standard Hydraulic Power Unit YP Pack. A low-noise, compact hydraulic power unit powered by a high-performance pump; its compact design is unrestricted by installation location, achieving an exceptionally quiet operating noise of 55 dB(A). Low-noise pump and drain cooler are mounted, and vibration-conscious component layout realizes low noise and low vibration. The vertically mounted pump and small tank give a compact design. The standard drain cooler and the pump's heat-radiating fins suppress oil-temperature rise, eliminating thermal distortion of the machine. Nine standard YP Pack models are offered, with seven option types including control circuits combining modular valves and solenoid valves. Motor: 50 Hz AC 200 V / 60 Hz AC 200 V or 220 V. Drain cooler: 50 Hz AC 200 V 28 W / 60 Hz AC 200 V 26 W / 60 Hz AC 220 V 31 W, lead 3 m. Options (-OP suffix): base plate (01M, 1-3 stations), pressure gauge block (G2/G3), return filter (F, TTF series), magnet (Mg), exterior paint change (PT), watertight inspection (RK), motor voltage change.

005 Series Modular Valves — Check. Sandwich/stack mounting. Detailed specifications by inquiry.