YSF8 series φ50mm directional oil injection pressure relief valve
The YSF8 series φ50mm directional oil spray pressure relief valve is mainly used for pressure release when the oil tank pressure of oil-immersed power transformers, power capacitors, reactors and other equipment is overpressure. At the same time, when the pressure in the oil tank drops to the closing pressure value of the valve, the valve reliably closes, preventing external moisture and impurities from entering the tank. The product adopts a directional oil spray method, which solves the pollution problem of transformer oil spraying and is an environmentally friendly product.
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Product Description
Product Introduction
The YSF8 series φ50mm directional oil spray pressure relief valve is mainly used for pressure relief when the oil tank pressure of oil-immersed power transformers, power capacitors, reactors and other equipment exceeds the pressure limit. At the same time, when the pressure in the oil tank drops to the closing pressure of the valve, the valve reliably closes, preventing external moisture and impurities from entering the tank. The product adopts a directional oil spray method, which solves the pollution problem of transformer oil spraying and is an environmentally friendly product.
Conditions of Use
Installation location: On the oil tank cover, on the riser, or on the side wall of the upper part of the oil tank;
Environmental requirements: -30℃～50℃; Working environment requirements: -30℃～+115℃.
The sealing value is an important parameter for the transformer's optional pressure relief valve.
(Note: The sum of the highest normal pressure value that appears when the pressure relief valve is in operation plus 7 kPa should be less than the sealing value of the pressure relief valve).
Model Description
*Note: D- indicates directional oil spray, K- indicates electrical signal, SK (or KK)- indicates dual electrical signals, J- indicates mechanical signal, TH- indicates for humid and hot regions, TA- indicates for dry and hot regions, T- indicates for dry and humid hot regions, B- indicates with locking device.
Note: YSF8, YSF10, YSF12, YSF14, YSF16 are all directional oil spray relief valves.
Example of Marking: YSF8-55/50KKJBTH refers to the 8th design, with a φ50mm oil spray diameter, opening pressure of 55kPa, directional oil spray, with mechanical and dual electrical alarm signals, for use in humid and hot regions, and with a locking device.
Product Appearance and Dimensions
Unit (units) mm
| Oil Spray Diameter | D | D1 | D2 | D3 | D4 | D5 | D6 | D7 | H | H1 | L | E | Valve Seat Mounting Bolts Diameter × Quantity |
Directional Port Bolts Diameter × Quantity |
| φ50（left） | φ84 | φ90 | φ97 | φ128 | φ150 | φ56 | φ88 | φ105 | 178 | 65 | 83 | 90 | M12×4 | M6×4 |
| φ50（right） | φ84 | φ90 | φ97 | φ128 | φ150 | φ50 | φ75 | φ85 | 178 | 60 | 70 | 90 | M12×4 | M6×4 |
Contact Capacity and Wiring Diagram
| Power Type | Voltage (A) | Current A | |
| Resistive Load | Inductive Load | ||
| AC | 220V | 5 | 3（cos φ=0.4） |
| DC | 0.3 | 0.05（T=7ms） | |
Product Wiring Diagram
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