Before purchasing a transformer pressure relief valve, how do you determine the model, size, and mounting method?
Date: July 9, 2026, 02:12:02
- pressure relief valveBefore purchasing, confirm the model, nominal diameter, opening pressure, signal type, and installation method.
- Pressure relief valves such as the YSF9-80K/130K, YSF9-70K/80K, and YSF Φ25mm and Φ50mm are designed for different sizes and configurations; their specifications must not be interchanged.
- Pressure relief valves must not be replaced arbitrarily based on their names; instead, the transformer’s design, nameplate, and drawings should be used as the basis for selection.
Transformer pressure relief valves are critical components for ensuring the safety of oil-filled equipment tanks; when purchasing them, it is not sufficient to simply specify “one pressure relief valve.” Information included in the model number—such as the nominal diameter, opening pressure, whether it includes an electrical signal, whether it features directional oil discharge, and whether it is intended for use in humid tropical regions—can all influence the selection process.
Innotongda YSF9-80K/130K Pressure Relief Valve: The YSF series pressure relief valves, with nominal diameters of Φ80mm and Φ130mm, are primarily designed for pressure relief in the oil tanks of large oil-immersed power transformers, power capacitors, reactors, and other equipment when overpressure occurs. In the model suffix, “D” indicates directional oil discharge, “K” indicates an electrical signal, “SK” or “KK” indicates a dual-channel electrical signal, “J” indicates a mechanical signal, “TH” indicates use in humid tropical regions, and “B” indicates a locking device. YSF Φ25mm and Φ50mm pressure relief valves can be used to protect the oil chambers of oil-immersed equipment, such as transformers, tap changers, and power capacitors.
| Confirm Project | The customer should provide | For your reference |
|---|---|---|
| Full Model Number | Old valve nameplates, design drawings | The YSF model designations include D, K, SK, J, TH, B, and others. |
| Injector caliber | Φ25, Φ50, Φ80, Φ130, etc. | Different calibers correspond to different models. |
| Cracking Pressure | Nameplate or Design Requirements | The opening pressure must be confirmed based on the complete model number. |
| Signal Format | Requirements for Electrical, Dual-Channel, and Mechanical Signals | The model letters can help with identification |
| Installation | Fuel tank cap location, flange, and whether fuel injection is directional | This needs to be confirmed by referring to the drawings and on-site photos. |
The specifications for the YSF9-80K/130K include effective diameters of Φ80 and Φ130, corresponding to different opening pressures, closing pressures, and sealing pressures; the installation and operation section states that the pressure relief valve should be installed on the tank cover and, if necessary, may also be installed at an angle of 0–90°. A flange for connecting to the pressure relief valve must also be provided during installation.
When placing an order, we recommend that customers provide the nameplate of the old valve, the transformer nameplate, photos of the installation location, flange dimensions or drawings, and information on whether directional oil injection is required and whether an electrical alarm signal is needed. For new projects, it is best to provide the technical requirements issued by the design institute or the original equipment manufacturer (OEM). If the customer only provides a vague description, preliminary discussions can be based on the nominal diameter and model letters; however, final confirmation must still be based on technical documentation.
Related FAQs
1. What does the "K" in the YSF model number stand for?
The model suffix "K" indicates that it includes an electrical signal.
2. What do D, SK, J, TH, and B stand for?
"D" indicates directional oil injection; "SK" or "KK" indicates dual electrical signals; "J" indicates a mechanical signal; "TH" indicates use in humid tropical regions; and "B" indicates a locking device.
3. Can a pressure relief valve be installed at an angle?
If necessary, it can be installed at an angle of 0–90°, but the specific installation method must be confirmed based on the on-site structure and drawings.
4. Can I place an order if I only know the caliber?
Not recommended. You’ll also need to confirm the opening pressure, signal type, mounting flange, and complete model number.
5. How do I choose between Φ25, Φ50, Φ80, and Φ130?
Different models are suitable for different applications; specific details should be confirmed based on the transformer’s design, capacity, and original model specifications.
