Vickers is a world-famous hydraulic brand under the fluid power department of Eaton group. Its main products include hydraulic pumps, motors, oil cylinders, hydraulic valves, etc. Eaton's fluid power products are widely used, including earth moving machinery, agriculture, construction, aviation, mining, forestry, public facilities and material handling. The products cover all fields of automobile, truck, heavy equipment, civil aviation, national defense, residence,telecommunications and data transmission, industrial equipment and public facilities, commercial institutions and government agencies, as well as sports and entertainment.
The **Vickers DGMFN-3-Y-A2W-B2W-41** is a complete model code for a **Sandwich-Type Two-Way Flow Control Valve (with relief function)**. This follows the typical naming convention for hydraulic valves from Vickers, a brand under Eaton Corporation.
Let's break down each part of the model code:
1. **DGMFN:** **Base Valve Model**
* **DG:** Indicates the **Sandwich (stackable) valve series**.
* **MF:** Signifies a **Two-Way Flow Control Valve** (Metering Flow Control Valve).
* **N:** Denotes that this valve **includes a relief function**. This means that if the outlet pressure exceeds the set value, the relief valve opens to divert excess flow back to the tank, protecting downstream components. This is a key feature of this valve.
2. **-3:** **Size / Porting**
* **3:** Represents **NG6 (DIN 24300)** size. This is a European standard sandwich valve size with an interface conforming to **ISO 4401-03-02-0-94**. This indicates it's suitable for medium flow applications, with a typical flow range around 40 L/min (refer to specific curves for exact data).
3. **-Y:** **Pressure Adjustment Mechanism Type**
* **Y:** Indicates a **Hex adjusting screw with locking cap**. This is the most common manual adjustment method for setting flow rate or relief pressure.
4. **-A2W:** **Port A Maximum Operating Pressure Rating**
* **A:** Refers to the valve's **A port** (work port).
* **2W:** This is a specific pressure rating code. In Vickers flow valve nomenclature, **2W** typically signifies a maximum operating pressure of **350 bar (5075 psi)**. **This suffix is critical for the valve's performance.**
5. **-B2W:** **Port B Maximum Operating Pressure Rating**
* **B:** Refers to the valve's **B port** (work port).
* **2W:** Also signifies a maximum operating pressure rating of **350 bar (5075 psi)**. **This confirms that both work ports of the valve can withstand pressures up to 350 bar.**
6. **-41:** **Design Revision / Version Number**
* **41:** This is an internal Vickers design sequence or version identifier. It may denote specific materials, seals, internal optimizations, or manufacturing batches, but it does not affect the valve's basic function or interface size. Always use the full model code for procurement or replacement.
**Summary: What is the Vickers DGMFN-3-Y-A2W-B2W-41?**
* **Type:** Sandwich-Type Two-Way Flow Control Valve (with relief function).
* **Primary Functions:**
* Controls flow rate (meters) in one direction to an actuator (like a cylinder or motor), thereby controlling its speed.
* Allows free flow in the opposite direction (acting like a check valve in this mode).
* **Integral relief valve** protects downstream components from overpressure damage (relieves flow when outlet pressure exceeds the set value).
* **Size:** NG6 (ISO 4401-03-02-0-94).
* **Pressure Adjustment:** Manual (with locking protective cap).
* **Key Performance Parameters:**
* **Port A Max. Operating Pressure:** 350 bar (5075 psi).
* **Port B Max. Operating Pressure:** 350 bar (5075 psi).
* **Max. Relief Setting Pressure:** Typically less than or equal to the max. operating pressure (e.g., 315 bar) - consult the datasheet. The nominal 350 bar is the pressure the ports can withstand.
* **Design Version:** 41.
**Applications:**
This valve is commonly used in applications requiring precise control of actuator speed in one direction, while also needing protection against pressure spikes caused by loads in that same direction. Examples include:
* Controlling cylinder extend speed and providing overload protection during the extend stroke.
* Controlling hydraulic motor speed in one rotation direction and providing overload protection for that direction.
