OKE Continuous Blowdown Regulating ValveOverview

Definition and Function of Continuous Blowdown Regulating Valve

The continuous blowdown regulating valve is a critical device for controlling blowdown volume in boilers, pressure vessels, or other containers. It is widely used in thermal systems such as power plants, chemical plants, and metallurgical industries. Its function is to regulate the discharge of dissolved salts in boiler feedwater, ensuring water quality compliance, preventing corrosion and scaling caused by impurities, and thereby guaranteeing the safe operation and efficiency of the equipment.

Structure and Working Principle of Continuous Blowdown Regulating Valve

The continuous blowdown regulating valve typically consists of a valve body, a valve stem, and a valve seat. The valve stem can slide up and down within the valve body. When the stem is lifted, the blowdown regulating valve begins to discharge, with the blowdown volume determined by the conical gap between the valve seat and the valve core. The higher the stem is lifted, the larger the gap, and the greater the blowdown volume. This design ensures zero leakage when the valve is closed and enables step-by-step pressure reduction through the toothed sealing structure of the valve seat when open, reducing erosion and extending the valve's service life.

Continuous Blowdown Regulating Valve

Installation and Usage Precautions for Continuous Blowdown Regulating Valve

When installing the continuous blowdown regulating valve, it should be mounted vertically on horizontal pipelines, with consideration for ease of operation and maintenance. Avoid imposing additional stress on the valve during installation to prevent impacts from temperature or self-weight affecting normal use. For installation on long pipelines, supports should be installed, and vibration mitigation measures should be taken in high-vibration environments. After installation, the pipeline should be cleaned to ensure the valve is in a fully open position.

During use, adjust the valve opening according to water quality conditions to maintain the required blowdown volume. For remotely controlled valves, electric or pneumatic actuators can be equipped to facilitate remote operation.

Maintenance and Care of Continuous Blowdown Regulating Valve

Maintenance and care are crucial for ensuring the normal operation and extending the service life of the continuous blowdown regulating valve. This includes regularly inspecting the valve's sealing performance, cleaning the valve seat and stem, and replacing damaged parts as necessary. During maintenance, shut off the upstream and downstream valves to isolate the valve from the system and perform repairs under zero pressure conditions.

In summary, the continuous blowdown regulating valve is an essential component for ensuring the safe and efficient operation of boilers and other thermal equipment. Proper installation, usage, and maintenance are vital for maximizing its performance.

OKE Continuous Blowdown Regulating ValveFeatures

★Fluid undergoes step-by-step pressure reduction with continuously changing flow direction, increasing flow resistance, controlling flow velocity, and preventing cavitation damage. The allowable pressure difference within the valve is 15 MPa.

★Multi-stage throttling: Four-stage throttling for large flows and five-stage throttling for small flows, reducing fluid erosion and abrasion on the valve core surface.

★Throttling surface and sealing surface are separated. The valve core and sleeve are surface-hardened to HRC70, ensuring tight closure and long service life.

★The valve core surface features large notches, allowing fluid with solid particles (e.g., 2–3 mm welding slag) to pass without jamming, ensuring flexible operation.

★Excellent flow regulation characteristics with a wide adjustment range (approximately 60%–70%). This regulating valve has been successfully applied in many power plants.

OKE Continuous Blowdown Regulating ValveDetailed Parameters

Diameter DN15–300 mm

Pressure PN10–PN420

Applicable Temperature -30 to +425°C

Applicable Media Water, oil, gas, etc.

Connection Type Flange or welded

Valve Body Material WCB, 304, 316

Valve Disc Material 304, 316, PTFE-lined

Sealing Material PTFE, 304, 316

Flow Direction Unidirectional

Application Regulation

Actuation Manual, electric, pneumatic

Type Straight-through