Hydraulic Valves

Hydraulics

Hydraulic valves are the precision control elements at the heart of every fluid power circuit. Directional control valves switch flow paths in as little as 20-80 ms, pressure relief valves protect systems up to 350 bar, and throttle check valves regulate flow from 0.1 to 500 L/min - all to ISO 4401 and ISO 1219 port and symbol standards. Seat valves achieve near-zero internal leakage (<1 cm³/min), while slide valves and intermediate plate designs allow modular stacking without external pipework, reducing installation time by up to 60 %.

fluidics-equipment.com stocks 467 hydraulic valve products across 12 subcategories - covering directional valves, pressure relief, throttle-check, hand lever, seat valves, and full system accessories. All major valve families conform to ISO 4401 (mounting interface), DIN 24340, and EN ISO 6403, ensuring direct interchangeability between brands and straightforward integration into existing manifold and connection-plate assemblies.

Gear Pumps External and internal gear, 1-250 cm³/rev, up to 250 bar, ISO 4401 Accessories Seals, fittings, pressure gauges, filters - up to 400 bar rated Three-phase motors IE2/IE3 efficiency, 0.09-200 kW, B3/B5/B14 mounting, IEC 60034 Throttle check valves Bi-directional flow control 0.1-500 L/min, up to 350 bar, ISO 1219 Hand lever valves 2/2, 3/2, 4/3-way manual actuation, up to 315 bar, detent or spring-return Pressure relief valves Direct and pilot-operated, 5-350 bar set range, <3 % hysteresis Slide Valves 6/2-Way 6/2-way spool design, spring-return or detent, ISO 4401 NG6/NG10 Connection plates ISO 4401 NG6-NG32 interface, steel or aluminium, up to 350 bar Intermediate plate valves Sandwich-mount NG6/NG10/NG16, check, throttle, or pressure functions Pressure relief valves Cartridge and inline pilot-operated types, 10-400 bar, DIN 24340 Seat valves 2/2-way Poppet seat, leak-free <1 cm³/min, DN6-DN32, up to 350 bar Directional valves 4/2, 4/3-way solenoid or manual, NG4-NG25, switching time 20-80 ms

Key technical advantages - Hydraulic Valves at a glance

⚡ Up to 350 bar - operating pressure across seat, spool and relief valve families

↕ 0.1-500 L/min - flow range covered by throttle-check and directional valve series

🛠 ISO 4401 NG4-NG32 - standardised mounting interface for direct interchangeability

⚙ 20-80 ms switching - fast solenoid response in directional control valves

🛡 <1 cm³/min leakage - poppet seat valves for zero-drift load holding (ISO 6403)

✓ 467 products in stock - DIN 24340 and EN ISO 1219 compliant across all 12 valve types

Directional valves vs. Seat valves vs. Pressure relief valves vs. Throttle check valves - technical comparison

Criterion	Directional valves	Seat valves 2/2	Pressure relief valves	Throttle check valves
Primary function	Flow direction switching	On/off leak-free shutoff	System overpressure protection	Flow rate regulation
Max. operating pressure	315 bar (NG25)	350 bar	400 bar	350 bar
Flow range	up to 400 L/min	up to 300 L/min	up to 500 L/min	0.1-500 L/min
Leakage	ca. 5-50 cm³/min (spool)	<1 cm³/min (poppet)	minimal (closed)	check direction: zero
Actuation	Solenoid / manual / pilot	Solenoid / hydraulic pilot	Spring (direct/pilot-operated)	Manual needle / fixed orifice
Mounting standard	ISO 4401 NG4-NG25	Threaded cartridge / ISO 4401	Inline / cartridge / ISO 4401	Sandwich / inline (NG6-NG16)
Switching response	20-80 ms	ca. 30-100 ms	continuous (pressure-set)	continuous (flow-set)
Applicable norm	ISO 4401, DIN 24340	ISO 6403, DIN 24340	ISO 6945, DIN 24340	ISO 1219, DIN 24340

Hydraulic Valves - Product overview by type

Valve type	Application	Key specification	Feature
Directional valves	Cylinder and motor actuation circuits	4/2, 4/3-way; NG4-NG25; up to 315 bar	20-80 ms switching, ISO 4401
Seat valves 2/2-way	Load holding, clamping, leak-free shutoff	DN6-DN32; up to 350 bar; <1 cm³/min	Poppet seat, ISO 6403
Pressure relief valves	System overpressure protection, safety circuits	5-350 bar set range; <3 % hysteresis	Direct and pilot-operated, DIN 24340
Throttle check valves	Cylinder speed control, deceleration	0.1-500 L/min; up to 350 bar	Bi-directional, sandwich NG6-NG16
Hand lever valves	Manual machine control, service functions	2/2, 3/2, 4/3-way; up to 315 bar	Detent or spring-return, ISO 1219
Intermediate plate valves	Compact manifold stacking circuits	NG6/NG10/NG16 sandwich; up to 315 bar	No external pipework, ISO 4401
Slide valves 6/2-way	Multi-port switching, dual-feed circuits	6/2-way spool; NG6/NG10; up to 315 bar	Spring-return or detent, ISO 4401
Connection plates	Subplate manifold assembly, valve mounting	NG6-NG32; steel or aluminium; up to 350 bar	ISO 4401 interface, DIN 24340

Typical fields of application: Mobile hydraulics and construction machinery (ISO 4401, DIN 24340), industrial press and clamping systems (EN ISO 6403), agricultural and forestry equipment (ISO 1219), factory automation and machine tools (DIN EN 13849), offshore and marine hydraulics (ISO 6945), steel and rolling mill drives (ISO 4401, DIN 24340)

✓

467 hydraulic valve products Directional, seat, relief, throttle-check - all ISO 4401 and DIN 24340 compliant

📦

<strong style="display