3C閥門類別	工業	動作方式	換向
流動方向	換向	使用壓力	21mpa
應用領域	環保,化工,石油,能源,包裝/造紙/印刷

東京計器TOKYOKEIKI電磁閥DG4M4-34C-200AC-20-JA

一、型號完整解析

DG4M4-34C-200AC-20-JA

DG4M4：系列名稱 — 超小型濕式電磁鐵液壓換向閥，板式安裝東京計器株式會社
3：閥芯形式 — 3 位 4 通，雙電磁鐵，彈簧對中（斷電自動回中位）東京計器株式會社
4：閥芯規格 — 特殊定制油孔 / 流量規格，滿足特定回路控制需求東京計器株式會社
C：彈簧形式 — 標準彈簧對中型東京計器株式會社
200AC：電氣規格 — AC 200V，50/60Hz 雙頻通用，樹脂封固線圈東京計器株式會社
20：設計編號 — 標準結構與尺寸代碼東京計器株式會社
JA：工廠標準規格標識（符合東京計器原廠品質規范）東京計器株式會社

二、核心技術參數

max.工作壓力：21 MPa東京計器株式會社
max.流量：約 7 L/min（02 規格）東京計器株式會社
適用介質：礦物油、水 - 乙二醇液壓油（F3 規格適配磷酸酯油）東京計器株式會社
介質溫度：-20°C ~ 70°C
安裝形式：疊加板式安裝（墊片密封）東京計器株式會社
響應頻率：max. 500 次 / 分鐘
絕緣等級：F 級
線圈保護：樹脂模注成型，防潮、防塵、防油濺東京計器株式會社

東京計器TOKYOKEIKI電磁閥DG4M4-34C-200AC-20-JA

三、功能與特點

超小型化設計：體積小巧，適配空間緊湊的液壓站與設備集成東京計器株式會社
濕式電磁鐵：低噪音、低功耗、響應快、壽命長，無外泄漏風險
雙頻通用線圈：AC 200V 直接兼容 50Hz/60Hz，無需改線或換線圈東京計器株式會社
彈簧對中可靠：3 位雙電磁鐵，斷電即回中位，防止系統誤動作東京計器株式會社
壓力穩定性強：適配中高壓精密控制回路，適合機床、自動化設備東京計器株式會社

四、安裝與使用注意事項

安裝前

沖洗管路（建議≥0.3MPa），清除焊渣、鐵屑、密封膠殘留，避免閥芯卡滯。
核對電壓（AC200V）、壓力、流量、介質與工況是否匹配，嚴禁超參數使用。
確認閥體上 P（進油）、A/B（工作口）、T（回油）口標識，不可裝反。

安裝時

固定閥體再擰接頭，扭矩勿過大，禁止直接受力于線圈組件導致變形。
螺紋密封時，留 1～2 牙不纏生料帶，防止碎屑入閥；液態膠勿過量。
避開強振源；若無法避免，使振動方向與閥芯動作方向垂直。
回油 T 口背壓不得超標，防止閥芯誤動作與內泄增大東京計器株式會社。

電氣與操作

電壓波動控制在 **±10%** 以內，建議配斷路器 / 熔斷器防過載、短路。
雙電磁鐵嚴禁同時通電；切換時先斷一側，再通另一側東京計器株式會社。
高壓下避免長時間持續通電，防止閥芯粘滯、切換失效東京計器株式會社。
手動應急按鈕僅用于調試，高背壓時操作力會顯著增大。

維護與安全

維修 / 拆解前必須斷電、泄壓，掛牌警示，佩戴護具。
定期檢查：有無滲漏、線圈異常發熱、異響、換向遲緩。
密封件、彈簧、閥芯磨損后務必使用原廠備件更換。
長期停用：排空存油、防潮防塵；重新啟用前先空載測試數次。

五、典型應用

機床：液壓夾具、工作臺、刀庫、主軸平衡缸
注塑 / 壓鑄機：頂針、抽芯、模厚調整、安全門控制
自動化線：小型液壓缸 / 馬達的方向與速度控制
輕工機械：液壓沖床、包裝機、紡織機械的精密控制回路

六、常用替換型號（同系列）

電壓變更：

DC24V：DG4M4-34C-24DC-20-JA
AC100V：DG4M4-34C-100AC-20-JA

閥芯形式變更（3 位雙電磁鐵）：

標準 O 型機能：DG4M4-30C-200AC-20-JA
其他定制機能：DG4M4-36C-200AC-20-JA

東京計器TOKYOKEIKI電磁閥DG4M4-34C-200AC-20-JA

Tokyo Keiki Solenoid Valve DG4M4-34C-200AC-20-JA

Tokyo Keiki (Tokimec) DG4M4-34C-200AC-20-JA is a high-performance miniature solenoid directional valve, specifically engineered for hydraulic systems that demand compact installation space and stable, precise directional control. It adopts a resin-molded dual-frequency coil design, fully compatible with 50/60Hz power supply without rewiring, and features a wet armature structure for efficient, low-noise, and long-term reliable operation. This valve is widely used in machine tools, industrial automation lines, injection molding machines, die casting equipment, and other hydraulic circuits requiring compact and precise control.

1. Complete Model Interpretation

Model: DG4M4-34C-200AC-20-JA

DG4M4: Series Name – Miniature solenoid directional valve (gasket mounting, wet armature type), designed for medium and high-pressure hydraulic systems, with a compact structure that saves installation space.
3: Spool Type – Spring-centered type (3-position, double solenoid), ensuring the spool automatically resets to the neutral position when the solenoid is de-energized, avoiding system misoperation and improving operational safety.
4: Spool/Spring Arrangement – Special customization specification, with a tailored spool configuration to meet specific flow and directional control needs of different hydraulic circuits.
C: Additional Configuration – Standard configuration, compatible with common hydraulic media and general industrial installation scenarios, no additional customization required for conventional applications.
200AC: Solenoid Voltage – AC 200V, dual-frequency (50/60Hz) resin-molded coil, corrosion-resistant and moisture-proof, adapting to different power supply environments without rewiring.
20: Design No. – Standard design code, representing the basic structural parameters, manufacturing standards, and material specifications of the valve body.
JA: Special Mark – Standard product identification, indicating compliance with Tokyo Keiki’s original factory quality standards, technical specifications, and after-sales service requirements.

2. Core Technical Specifications

Item	Specification
Maximum Operating Pressure	21 MPa (suitable for medium and high-pressure hydraulic systems)
Maximum Flow Rate	Approx. 7 L/min (matches the miniature size, meeting the flow demand of small to medium hydraulic actuators)
Solenoid Voltage	AC 200V, dual-frequency (50/60Hz), resin-molded coil with two terminals
Applicable Fluid	Mineral oil-based fluid, water-glycol-based fluid; optional for phosphate ester fluid (marked with "F3" in the model)
Operating Temperature Range	-20°C ~ 70°C (adapts to most industrial working environments)
Mounting Type	Gasket mounting (compact structure, easy to install and disassemble, convenient for maintenance)
Maximum Switching Frequency	500 cycles/min (ensures rapid response of the hydraulic system)
Insulation Class	Class F (meets industrial insulation standards, ensuring safe operation under long-term use)

3. Main Functions & Characteristics

Compact & Space-Saving Design

Adopting a miniature structural design, the valve features small volume and light weight, making it ideal for hydraulic systems with limited installation space. The gasket mounting method simplifies the installation process, reduces the overall layout space of the hydraulic circuit, and facilitates later maintenance and replacement.

Stable & Efficient Operation

Equipped with a wet armature structure, it has the advantages of low energy consumption, low noise, and fast response. The resin-molded coil is corrosion-resistant, moisture-proof, and dust-proof, ensuring stable operation in harsh industrial environments (such as high humidity, dust, and temperature fluctuations). The dual-frequency coil design eliminates the need for rewiring when switching between 50Hz and 60Hz power supplies, improving the versatility and applicability of the valve.

Reliable Directional Control

The spring-centered spool design (3-position, double solenoid) ensures that the spool automatically returns to the neutral position when the solenoid is de-energized, effectively preventing misoperation of the hydraulic system and protecting the actuator and related components. The customized spool arrangement (marked with "4") can be adapted to specific directional control requirements of different hydraulic circuits, enhancing the flexibility of application.

Wide Compatibility & High Durability

Compatible with multiple hydraulic media, it can be used in various industrial scenarios. It can be perfectly matched with other Tokyo Keiki hydraulic components (such as pumps, valves, and cylinders) to form a complete and efficient hydraulic control system. The valve body is made of high-quality materials, with strong pressure resistance and wear resistance, ensuring long service life and reducing maintenance costs.

4. Typical Application Scenarios

Machine tool hydraulic systems: Directional control of feed mechanisms, clamping mechanisms, tool changing mechanisms, and coolant control systems.
Injection molding machines/die casting machines: Control of mold opening, mold closing, ejection, and material feeding mechanisms.
Automatic production lines: Directional control of hydraulic actuators (such as cylinders and motors) in assembly lines, conveying lines, and sorting equipment.
Light industrial hydraulic equipment: Compact hydraulic systems requiring precise directional control, such as small hydraulic presses, packaging machinery, and textile machinery.

5. Model Selection & Replacement Recommendations

Same Series Alternative Models (Voltage Variation)

DC 12V: DG4M4-34C-12DC-20-JA
DC 24V: DG4M4-34C-24DC-20-JA
AC 100V: DG4M4-34C-100AC-20-JA

Same Series Alternative Models (Spool Type Variation)

Spring offset A type (2-position, single solenoid): DG4M4-32A-200AC-20-JA
Spring offset B type (2-position, single solenoid): DG4M4-32B-200AC-20-JA
Standard spring-centered type (3-position, double solenoid): DG4M4-30C-200AC-20-JA

Functional Equivalence

This valve can directly replace other Tokyo Keiki DG4M4 series solenoid valves with the same installation size, pressure, and flow parameters. It is also compatible with most standard hydraulic circuits of other brands, reducing replacement costs and maintenance time.

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