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**Product Specifications:**
- **Model No.:** YSF4II
- **Working Temperature:** Medium Temperature (120°C < T < 450°C)
- **Material of Seal Surface:** Soft Sealed
- **Valve Body:** Sheet Metal
- **Application:** Industrial Usage, Water Industrial Usage, Household Usage
- **Valve Usage:** With Transformer Oil Tank
- **Trademark:** CNVILLE
- **Transport Package:** Wooden Case or as Per Requirement
- **Specification:** ISO 9001:2000
- **Origin:** Ningbo, China
- **HS Code:** 85
**Application:**
This pressure relief valve is designed to work in conjunction with an electrical alarm signal for remote control. It is suitable for various electrical equipment such as gas or liquid insulated transformers, instrument transformers, on-load tap changers, and high-voltage switches. In case of any malfunction, the valve opens to release pressure and prevent damage to the oil tank from deformation or rupture. Once the pressure is reduced, the valve automatically closes to prevent water and impurities from entering.
**Working Conditions and Installation Mode:**
- Environment Temperature: -30°C ~ 40°C
- Installation Options:
A) Installed on top of the oil tank
B) Installed on the side of the oil tank
C) Installed on a lift pedestal
- Installation: Connect the pressure relief valve to the tank using stud bolts.
**Attention:**
1. Ensure the bottom of the pressure relief valve is well sealed.
2. When connecting the valve to the tank, tighten the bolts evenly to avoid damaging the valve pedestal.
- **Usage:** Remove the latch before equipment circulation to ensure proper operation.
- **Debugging:** The electric alarm switch should be manually tested to confirm accuracy and sensitivity before equipment is put into use.
- **Method:**
1. Measure the switch output signal when the pressure relief valve acts using a multimeter to check if it matches the switch’s marking.
- "Common" to "Normal Open" – Normal open
- "Common" to "Normal Closed" – Normal closed
2. Simulate the valve action by lifting the small red cap and check if the switch signal changes accordingly.
- For "Normal Open" switch: "Normal Open" should turn to "Normal Closed"
- For "Normal Closed" switch: "Normal Closed" should turn to "Normal Open"
3. Check the connection between the signal switch and the control circuit.
- **Note:** Replace the small red cap after testing to ensure the valve operates correctly and provides warnings.
**Dimensions Table:**
| Caliber of Oil-Gushing | D1 | D2 | D3 | D4 | H1 | H | Valve Pedestal Install Bolt Diameter × Quantity |
|------------------------|------|-------|-------|--------|----|-----|-----------------------------------------------|
| φ25 | φ46 | φ54 | φ90 | φ120 | 50 | 114 | M10×3 |
| φ50 | φ74 | φ83.5 | φ130 | 125×125| 50 | 114 | M12×4 |
| φ80 | φ122 | φ133 | φ170 | φ200 | 50 | 128 | M12×6 |
| φ130 | φ172 | φ181 | φ235 | φ260 | 50 | 128 | M16×6 |
**Images:**
[Pressure Relief Valve for Transformers](http://i.bosscdn.com/uploads/fa/6c/c0/787a1424be9984a8585a665664.jpg)
[Pressure Relief Valve for Transformers](http://i.bosscdn.com/uploads/04/a0/16/fd078653727747f9495cf57021.jpg)
[Pressure Relief Valve for Transformers](http://i.bosscdn.com/uploads/e5/ac/74/8adbc649beb783785d2808b86e.jpg)
**Our Best Service For You:**
1. **Pre-sale Service:**
a. Provide technical solutions
b. Send quotation, technical data sheet, and drawing
c. Prepare power transmission plan, testing plan, and shipment plan
2. **In-sale Service:**
a. Supervise the manufacturing schedule according to the plan
b. Send photos during each manufacturing process (hold point)
c. Inform the customer one week before testing
3. **After-sale Service:**
a. Installation, commissioning, and worker training
b. Quick response within 12 hours anytime
c. Provide a 12-month warranty period normally
**Welcome to contact with us:**
[Pressure Relief Valve for Transformers](http://i.bosscdn.com/uploads/ff/6b/f8/633d25c3a6321878234b555492.jpg)