DCT19 Water Hammer Prevention Valve
Devinsan offers sophisticated dynamic control solutions engineered for critical protection against destructive pressure surges and severe water hammer events in pumping systems. Designed for pipeline safety and hydraulic stabilization, these DCT19 Water Hammer Prevention Valve units utilize advanced pilot-operated mechanics to meet the crucial demands of modern municipal and high-pressure water conveyance networks.
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 DCT19 Water Hammer Prevention 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 DCT19 Water Hammer Prevention Valve ensures precise fluid control, maintains excellent sealing integrity, and supports efficient, safe operation even under demanding conditions.
The DCT19 Water Hammer Prevention Valve is a specialized, fast-acting control valve specifically engineered to automatically absorb and safely dissipate sudden pressure waves (surges) within a piping system. Designed to meet the stringent demands of modern infrastructure, this valve delivers essential structural protection, operational reliability, and long-term durability by actively managing the transient forces that cause joint failure and pipe fatigue.
At the core of the DCT19 Water Hammer Prevention Valve is its diaphragm-actuated main valve, which operates based on the sensing of an external pilot system. The pilot mechanism detects the immediate spike in pressure (the surge) and instantly signals the main valve to open rapidly and proportionally. By opening, the valve quickly diverts the high-pressure fluid, safely relieving the excess energy before the surge can damage the pipeline or equipment.
Manufactured from high-strength, corrosion-resistant materials (such as ductile iron) and built with a robust, angle or globe-style body, the DCT19 Water Hammer Prevention Valve is designed to withstand continuous system pressure and severe dynamic forces during discharge. Its geometry facilitates smooth energy dissipation during relief, minimizing noise and vibration. The ability to precisely reset the relief pressure provides crucial control over network safety margins.
The DCT19 Water Hammer Prevention Valve is ideally suited for applications immediately downstream of pump stations, at critical points on transmission mains, near rapid-closing valves, and anywhere that protection against hydraulic surge is essential for safety and structural longevity. Its superior rapid-response characteristics and dependable operation make it a preferred choice for engineers seeking a high-integrity, standards-compliant solution for long-term network protection and operational safety.
In summary, the DCT19 Water Hammer Prevention Valve offers an optimal combination of rapid surge response, precise over-pressure relief, and robust structural protection. With its pilot-operated design, durable construction, and focus on automatic safety, this unit stands as a trusted solution for modern fluid control and high-pressure system requirements worldwide.
1. General Information
The DCT19 Water Hammer Prevention Valve is designed for the accurate, automatic relief of surge pressure to protect the pipeline system. Proper installation, including securing the relief discharge path, is essential to guarantee safe operation and reliable protection.
2. Safety Precautions
Installation must be performed by qualified personnel only.
Ensure strict compliance with all local safety regulations and standards concerning working with pressurized pipelines and managing high-energy fluid discharge.
Wear appropriate personal protective equipment (PPE).
Confirm that the pipeline section is fully depressurized, isolated, and drained before attempting to install the DCT19 Water Hammer Prevention Valve.
3. Pre-Installation Checklist
Inspect the DCT19 Water Hammer Prevention 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 and the required surge relief set point.
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 the discharge pipe is securely supported and directed to a safe drain or reservoir.
4. Installation Procedure
Positioning: Install the DCT19 Water Hammer Prevention Valve by connecting its inlet to the pressurized line (typically via a tee fitting) and its outlet to the discharge line.
The valve must be installed with a dedicated isolation valve upstream for maintenance access.
Use the appropriate gaskets suitable for the medium and operating conditions.
Align the valve precisely with the pipe connection and insert bolts, tightening them gradually and crosswise in incremental steps.
Connect the pilot tubing securely and set the pilot mechanism to the designed maximum pressure threshold.
5. Post-Installation
Slowly 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 pilot system adjustment and confirm the valve relieves pressure accurately when the set point is reached during a test event.
Record the installation details, relief set pressure, and final notes for documentation purposes.
Proper maintenance extends the service life of the DCT19 Water Hammer Prevention Valve and ensures continuous, accurate system safety against transients. Follow the guidelines below to maximize the longevity of this essential unit.
1. Routine Operation
Visually inspect the DCT19 Water Hammer Prevention Valve exterior and pilot line tubing regularly (e.g., monthly) for signs of external leakage, vibration, or corrosion.
Monitor the system pressure closely to confirm the valve remains tightly closed at normal operating pressure and only relieves when the set point is exceeded.
2. Inspection Schedule
Monthly, check the pilot system strainers and filters for fouling and clean them to ensure accurate pressure sensing.
Quarterly, conduct a brief manual over-pressure test (if safe and possible) or cycle the valve to verify the main valve opens fully and reseals tightly after relief.
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 DCT19 Water Hammer Prevention Valve typically utilizes fluid-lubricated internal parts (water).
External components 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 the valve fails to reseal properly after a surge event (i.e., it drips or flows continuously).
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 DCT19 Water Hammer Prevention 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, gaskets) in a dry, clean, and cool environment, away from direct sunlight and temperature extremes.
Maintain a detailed record of all inspections, relief tests, and repairs performed on the DCT19 Water Hammer Prevention 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 DCT19?
What are the main advantages of this valve?
The DCT19 Water Hammer Prevention Valve provides immediate, fast-acting protection against hydraulic transients (surges), safeguarding the entire pipeline and connected equipment from catastrophic failure often caused by sudden pump shutdowns or rapid valve closures.
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.
Where is the best location to install the DCT19 Water Hammer Prevention Valve?
The best location is typically as close as possible to the source of the surge pressure, such as immediately downstream of a pump station or immediately upstream of a non-slam check valve, to quickly dissipate the surge energy.
How does the DCT19 Water Hammer Prevention Valve manage the pressure surge?
The valve uses a highly sensitive pilot that detects the instantaneous pressure spike and rapidly commands the main valve to open proportionally, quickly diverting the excess fluid pressure to a discharge point before the pressure wave fully develops.
How does this valve differ from a standard pressure relief valve?
The DCT19 Water Hammer Prevention Valve is designed for extreme, instantaneous surge detection and response. It reacts much faster and with greater force than a standard pressure relief valve, which typically detects slower pressure buildup and is used for steady-state over-pressurization.
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