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Product details

DHF16‑222‑00 Normally‑Closed Threaded Cartridge Valve

Product Overview

DHF16‑222‑00 is a 16‑size poppet‑type 2‑way normally‑closed screw‑in cartridge solenoid valve for hydraulic system. It adopts standard T7‑1 cartridge cavity installation. Equipped with manual override knob for debugging and power‑failure emergency operation. Poppet‑seat sealing structure delivers ultra‑low internal leakage. When de‑energized the main oil passage stays closed; when energized the poppet lifts to open oil circuit. Widely used for load‑holding, pressure‑releasing and safety protection loop of hydraulic power units, heavy‑duty lifting machinery and engineering hydraulic manifold blocks.

Main Technical Parameters

Item Specification

Model DHF16‑222‑00

Valve cavity size 16‑size standard T7‑1 cartridge cavity

Structure Poppet‑type two‑way normally‑closed threaded cartridge solenoid valve

Max working pressure 250 bar

Rated flow 150 L/min

Coil voltage option DC12V, DC24V, AC220V

Installation Screw‑in cartridge mounting into manifold block

Manual override Available

Seal material NBR O‑ring; FKM optional for high‑temperature condition

Hydraulic fluid Anti‑wear hydraulic oil ISO‑VG32 / VG46

Operating temperature ‑10℃ ~ +70℃

Required oil filtration ≤25 μm

Internal leakage Max 0.3 ml/min @210bar

Working Principle

1. De‑energized (Normally‑Closed) state: Return spring presses poppet tightly against valve seat. Main oil port is shut off, reverse flow is blocked, only allows one‑way check‑valve flow, realizing load‑holding function.

2. Energized state: Electromagnetic force pushes poppet upward and separates from seat. The valve opens completely to realize bi‑directional oil flow.

3. Manual override function: Red knob on valve top can mechanically lift poppet for emergency opening during power‑off or on‑site commissioning, auto‑reset after releasing.

4. Power cut‑off, return spring pushes poppet back to seat, valve returns to normally‑closed condition automatically.

Core Advantages

1. Standard 16‑size T7‑1 cavity, compatible with mainstream 16 series manifold blocks on market.

2. Hardened poppet‑seat sealing, extremely low internal leakage, excellent load‑holding performance for pressure‑maintaining circuits.

3. Large flow capacity up to 150L/min, suitable for heavy‑duty hydraulic equipment.

4. Built‑in manual override knob, convenient for test and emergency troubleshooting.

5. Replaceable independent coil, maintenance without removing whole valve cartridge.

6. Compact screw‑in cartridge layout, reduces pipeline fittings, makes hydraulic system concise.

Application Scope

Heavy‑duty hydraulic power packs, large aerial work platforms, construction machinery, metallurgical equipment, press machine, load‑holding, pressure relief and safety on‑off control loops for industrial hydraulic system.

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

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Main Product: hydraulic motor, gear box, hydraulic pump, hydraulic valve , hydraulic winch, hydraulic system

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