DCT22 Pump Control Valve
Devinsan offers advanced hydraulic sequencing solutions engineered for smooth pump startup and controlled, gradual shutdown to eliminate pressure surge and cavitation damage. Designed for pipeline safety and hydraulic stabilization, these DCT22 Pump Control Valve units utilize pilot-operated mechanics to meet the crucial demands of modern municipal pumping stations and high-head transmission systems.
Production Standard
Nominal Dimension (DN)
Nominal Pressure (PN)
Operating Temperature
Connection
Coating
Testing
DN 40 – DN 200
PN 6-PN 10-PN 16
-30° / +200°
EN 1092-2 ISO7005-2 Flanged
Electrostatic Powder Epoxy
TS EN 14384
Application Areas
The DCT22 Pump Control Valve is widely used across diverse industrial and commercial sectors, delivering reliable flow control and long‑lasting performance.
1. Water and Wastewater Systems
2. Chemical Industry
3. Food and Beverage Industry
4. Pharmaceutical Industry
5. Oil and Gas Industry
6. HVAC (Heating, Ventilation, Air Conditioning) Systems
In these applications, this type DCT22 Pump Control Valve ensures precise fluid control, maintains excellent sealing integrity, and supports efficient, safe operation even under demanding conditions.
The DCT22 Pump Control Valve is a sophisticated, hydraulically-operated valve specifically engineered to manage the acceleration and deceleration of flow caused by the starting and stopping of main pumps. Designed to meet the stringent demands of modern infrastructure, this specialized valve ensures peak operational reliability and long-term durability by actively mitigating severe pressure transients (water hammer) and system shock.
At the core of the DCT22 Pump Control Valve is its diaphragm-actuated main valve, which operates based on precise timing and pressure signals from a multi-functional pilot system. When the pump starts, the valve opens slowly and gradually, preventing rapid pressurization. When the pump stops, the valve closes slowly and smoothly after the pump power is cut off, effectively absorbing the resulting reverse pressure wave.
Manufactured from high-strength, corrosion-resistant materials (such as ductile iron) and built with a robust, globe-style body, the DCT22 Pump Control Valve is designed to withstand continuous high pressure and severe dynamic switching forces. Its specialized trim design ensures stable modulation near the seating area, providing the controlled timing necessary to protect both the pipeline and the pump motor from electrical and mechanical stress.
The DCT22 Pump Control Valve is ideally suited for applications immediately downstream of large centrifugal pumps in water supply, irrigation, and industrial process systems where controlled system charging and discharge are essential. Its superior dynamic regulation and reliable sequencing make it a preferred choice for engineers seeking a high-integrity, standards-compliant solution for long-term pump protection and overall pipeline integrity.
In summary, the DCT22 Pump Control Valve offers an optimal combination of controlled flow acceleration, pressure surge elimination, and robust sequencing reliability. With its pilot-operated design, durable construction, and focus on safeguarding the entire pumping station, this unit stands as a trusted solution for modern fluid control and critical infrastructure requirements worldwide.
1. General Information
The DCT22 Pump Control Valve is designed for the accurate, automatic control of flow sequencing during pump startup and shutdown. Proper installation is essential to guarantee safe operation, long service life, and efficient surge prevention.
2. Safety Precautions
Installation must be performed by qualified personnel only.
Ensure strict compliance with all local safety regulations and standards concerning working with high-pressure pipelines, pumps, and specialized hydraulic systems.
Wear appropriate personal protective equipment (PPE).
Confirm that the pump is electrically locked out and the pipeline section is fully depressurized, isolated, and drained before attempting to install the DCT22 Pump Control Valve.
3. Pre-Installation Checklist
Inspect the DCT22 Pump Control Valve for any visible damage during transport or storage, paying attention to the main diaphragm housing and pilot tubing integrity.
Check that the valve type, size, and pressure rating match the system requirements.
Verify that the valve interior and pilot line strainers are clean and free from debris.
Confirm that the mating pipeline flanges are properly aligned (parallel and concentric) and free from burrs or sharp edges.
Ensure sufficient space is available above the valve for pilot access and main cover removal during maintenance.
4. Installation Procedure
Positioning: Install the DCT22 Pump Control Valve immediately downstream of the pump, ensuring the flow direction adheres to the arrow cast on the body.
The valve is typically installed with dedicated isolation valves and often integrates electrical signals from the pump starter (though controlled hydraulically).
Use the appropriate gaskets suitable for the medium and operating conditions.
Align the valve precisely between the pipeline flanges and insert bolts, tightening them gradually and crosswise in incremental steps.
Connect the pilot tubing securely and set the pilot mechanism to the designed opening and closing rates.
5. Post-Installation
Slowly open the upstream isolation valve to reintroduce fluid and pressurize the system, checking immediately for leaks around the flange connections and the pilot tubing.
If leakage is detected, depressurize the system immediately and re-tighten the bolts or connections following the cross-pattern sequence.
Verify the control sequence by cycling the pump (start and stop) and confirming the DCT22 Pump Control Valve opens and closes gradually without causing surge.
Record the installation details, timing settings, and final notes for documentation purposes.
Proper maintenance extends the service life of the DCT22 Pump Control Valve and ensures reliable dynamic control and surge mitigation. Follow the guidelines below to maximize the longevity of this essential unit.
1. Routine Operation
Visually inspect the DCT22 Pump Control Valve exterior and pilot line tubing regularly (e.g., monthly) for signs of external leakage, vibration, or corrosion.
Monitor the smooth operation of the valve during pump cycles; any sudden movement indicates a pilot setting fault or restriction.
2. Inspection Schedule
Monthly, check the pilot system strainers and filters for fouling and clean them to ensure accurate hydraulic timing.
Quarterly, check the function of the main valve by monitoring its smooth opening and closing stroke against the established time settings.
Annually, perform a detailed internal inspection by removing the main cover to check the condition of the diaphragm, seating surface, and stem seals for wear or pitting.
3. Lubrication
The DCT22 Pump Control Valve utilizes fluid-lubricated internal parts (water).
External stem threads or guides (if applicable) may require periodic lubrication; use only recommended grease types.
4. Seal and Gasket Replacement
Replace the main cover/diaphragm gasket and pilot tubing seals immediately if external leakage is observed.
The main valve seat and disc seals should be replaced if control fails (i.e., the valve opens or closes too quickly, leading to surge).
Always isolate the valve and fully depressurize and drain the line before attempting any maintenance work requiring cover removal.
5. Cleaning
Keep the exterior of the DCT22 Pump Control Valve clean to prevent surface corrosion.
If the valve is disassembled, clean all internal guiding surfaces and the pilot line components carefully to ensure precision hydraulic response.
6. Storage and Spare Parts
Store spare parts (diaphragms, pilot kits, timing valves, gaskets) in a dry, clean, and cool environment, away from direct sunlight and temperature extremes.
Maintain a detailed record of all inspections, timing calibrations, and repairs performed on the DCT22 Pump Control Valve unit.
We prioritize quality at every stage of production to deliver durable, safe, and efficient products. Our continuous improvement and strict quality controls keep us at the forefront of the industry.
Our certifications prove our commitment to excellence and compliance with international standards, ensuring the safety and reliability of our products worldwide.
We continuously invest in innovation and quality to expand our certifications and meet evolving industry needs.
Frequently Asked Questions about the DCT22?
What are the main advantages of this valve?
The DCT22 Pump Control Valve eliminates the destructive effects of water hammer and pipe surge by precisely controlling the rate at which flow accelerates (startup) and decelerates (shutdown), significantly extending the life of the pump, motor, and pipeline.
Why should I choose this product?
This valve delivers outstanding performance in both sealing and durability, making it a dependable choice for demanding applications. Its straightforward design facilitates easy installation, offering flexibility during system design. With a wide range of material options, it meets the needs of various infrastructure projects, from municipal water networks to industrial facilities.
How does the DCT22 Pump Control Valve protect the pump motor?
It protects the pump motor by ensuring the pump starts and stops against a restricted flow, which prevents dangerous motor overloading and excessive electrical current fluctuations during the vulnerable startup and shutdown cycles.
What is the role of the pilot system in the DCT22 Pump Control Valve?
The pilot system is responsible for sensing the changes in pump status (pressure rise/fall) and hydraulically controlling the main valve’s opening and closing speed through adjustable needle valves and timing components.
Does the DCT22 Pump Control Valve replace a check valve?
No. The DCT22 Pump Control Valve controls the pump’s flow dynamics. A separate check valve or the control valve itself (with necessary modification) is required to provide the final, static backflow isolation.
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