• Weld-on type Radiator Valve.
• Forged Steel Body for high durability.
• 100% Leakage Testing at 3kg/cm for zero leakage valves.
• 100% tested to withstand full vacuum for zero leakage valves.
• Maximum allowable leakage through flap less than 1cc/minute with transformer oil at 1kg/cm² for Series 210.
• Double sealing on the shaft to protect against leakage during the lifetime of the transformer.
• Valve supplied with mounting gasket or ‘O’ Ring.

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The Series 203 Plate Type Radiator Valve is engineered for reliable isolation and flow control in transformer and radiator applications. Designed with a robust bolt-on aluminium body and metal-to-metal sealing, this valve ensures controlled leakage performance and long-term durability in demanding environments.

Built for strength and reliability, the valve features a forged steel body and undergoes 100% pressure testing to guarantee minimal leakage through the flap. With allowable leakage of less than 1cc/minute (tested with transformer oil at 1 kg/cm²), the valve provides dependable sealing performance for critical operations. For applications requiring zero leakage, O-ring sealing models (Series 213) are also available.

The valve’s strong and sturdy construction ensures maintenance-free service, while the ability to lock in both open and closed positions enhances operational safety and control. It is suitable for extreme operating conditions, performing efficiently in temperatures as low as -60°C and as high as 180°C.

Additional features include optional protective coatings in various shades and offshore-grade configurations (C5M & CX category) for harsh environmental conditions.

Key Features:

• Series 203 plate type with metal-to-metal sealing
• Bolt-on aluminium body with forged steel components
• Controlled leakage: <1cc/min (transformer oil at 1 kg/cm²)
• Zero leakage option available (Series 213 with O-ring sealing)
• 100% pressure tested for reliability
• Lockable in both open and closed positions
• Strong, maintenance-free construction
• Suitable for extreme temperatures: -60°C to +180°C
• Optional offshore-grade protection (C5M & CX)
• Custom paint coatings available on request

Applications:
Ideal for transformer radiators, power generation, substations, and industrial cooling systems where reliable isolation and controlled leakage are critical.

The Series 203 Radiator Valve delivers dependable performance, durability, and safety in even the most demanding operating environments.

The post Series 203 Plate Type, Metal to Metal Sealing (Bolt-On, Aluminium Body) appeared first on Major Valves.

• Zero leakage for ‘O’ Ring sealing models (Series 213).
• Maximum allowable leakage through flap less than 1cc/minute with transformer oil at 1kg/cm² for metal to metal contact models (Series 203, 204).
• Forged steel body.
• 100% pressure testing for leakage through flap.
• Strong and sturdy construction for maintenance free service.
• Locking possible at both open and shut position.
• Additional paint protection to any shade on request.
• Optional valves for Off-shore application (C5M & CX category).
• Extreme low temperatures (-60 C).
• High Temperatures up to 180 C.

The post Series 204 Flange Type, Metal to Metal Sealing (Bolt-On, Aluminium Body) appeared first on Major Valves.

• Pressure die cast Aluminium body, flap, and operating handle
• Aluminium flap with the “O” Ring ensures zero leakage when the valve is closed.
• Optional M16 fixing screws.
• Mounting gasket supplied with the valves.
• Spring-loaded screws with three “O” Ring provides foolproof sealing from the shaft.
• Very light and sturdy construction.
• NBR “O” Ring is easily replaceable.

The post Series 203 Flange Type, Metal to Metal Sealing (Bolt-On, Aluminium Body) appeared first on Major Valves.

• Zero leakage for ‘O’ Ring sealing models (Series 213).
• Maximum allowable leakage through flap less than 1cc/minute with transformer oil at 1kg/cm² for metal to metal contact models (Series 203, 204).
• Forged steel body.
• 100% pressure testing for leakage through flap.
• Strong and sturdy construction for maintenance free service.
• Locking possible at both open and shut position.
• Additional paint protection to any shade on request.
• Optional valves for Off-shore application (C5M & CX category).
• Extreme low temperatures (-60 C).
• High Temperatures up to 180 C.

The post Series 213 Plate Type, Zero Leakage appeared first on Major Valves.

• Zero leakage for ‘O’ Ring sealing models (Series 213).
• Maximum allowable leakage through flap less than 1cc/minute with transformer oil at 1kg/cm² for metal to metal contact models (Series 203, 204).
• Forged steel body.
• 100% pressure testing for leakage through flap.
• Strong and sturdy construction for maintenance free service.
• Locking possible at both open and shut position.
• Additional paint protection to any shade on request.
• Optional valves for Off-shore application (C5M & CX category).
• Extreme low temperatures (-60 C).
• High Temperatures up to 180 C.

The post Series 213 Flange Type, Zero Leakage appeared first on Major Valves.

• Zero leakage for ‘O’ Ring sealing models (Series 213).
• Maximum allowable leakage through flap less than 1cc/minute with transformer oil at 1kg/cm² for metal to metal contact models (Series 203, 204).
• Forged steel body.
• 100% pressure testing for leakage through flap.
• Strong and sturdy construction for maintenance free service.
• Locking possible at both open and shut position.
• Additional paint protection to any shade on request.
• Optional valves for Off-shore application (C5M & CX category).
• Extreme low temperatures (-60 C).
• High Temperatures up to 180 C.

The post Series 203 Plate Type, Metal to Metal Sealing appeared first on Major Valves.

• Zero leakage for ‘O’ Ring sealing models (Series 213).
• Maximum allowable leakage through flap less than 1cc/minute with transformer oil at 1kg/cm² for metal to metal contact models (Series 203, 204).
• Forged steel body.
• 100% pressure testing for leakage through flap.
• Strong and sturdy construction for maintenance free service.
• Locking possible at both open and shut position.
• Additional paint protection to any shade on request.
• Optional valves for Off-shore application (C5M & CX category).
• Extreme low temperatures (-60 C).
• High Temperatures up to 180 C.

g (80mm Pad Lockable, Forged Steel)

The post Series 204 Flange Type, Metal to Metal Sealing appeared first on Major Valves.

• Zero leakage for ‘O’ Ring sealing models (Series 213).
• Maximum allowable leakage through flap less than 1cc/minute with transformer oil at 1kg/cm² for metal to metal contact models (Series 203, 204).
• Forged steel body.
• 100% pressure testing for leakage through flap.
• Strong and sturdy construction for maintenance free service.
• Locking possible at both open and shut position.
• Additional paint protection to any shade on request.
• Optional valves for Off-shore application (C5M & CX category).
• Extreme low temperatures (-60 C).
• High Temperatures up to 180 C.

The post Series 203 Flange Type appeared first on Major Valves.