DCT26 Deluge Valve
Devinsan offers specialized high-flow suppression solutions engineered for instantaneous, high-volume water release and critical response in severe fire hazards. Designed for robust system readiness and reliable hydraulic actuation, these DCT26 Deluge Valve units utilize a sensitive hydraulic release mechanism to meet the crucial demands of modern industrial process protection and high-risk environments.
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 DCT26 Deluge 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 DCT26 Deluge Valve ensures precise fluid control, maintains excellent sealing integrity, and supports efficient, safe operation even under demanding conditions.
The DCT26 Deluge Valve is a large-scale isolation valve specifically engineered to control the massive flow of water into deluge fire suppression systems, which discharge water simultaneously through all open nozzles upon activation. Designed to meet the stringent demands of modern infrastructure, this specialized valve ensures rapid system flooding, outstanding operational reliability, and long-term durability in environments prone to large, fast-spreading fires.
At the core of the DCT26 Deluge Valve is its hydraulically operated main clapper, which is held closed by water pressure trapped in the control chamber above the clapper. When the separate fire detection system (e.g., heat/smoke detectors) activates, it triggers a quick-opening device that vents the pressure from the control chamber. The resultant pressure imbalance instantly forces the main clapper open, allowing full flow to the sprinkler network.
Manufactured from high-strength, corrosion-resistant materials (such as ductile iron) and built with a robust, heavy-duty body, the DCT26 Deluge Valve is designed to withstand continuous system pressure and the dynamic forces of rapid, high-volume water discharge. Its standard flanged connections allow for secure integration into the main water riser. The unit is typically kept dry on the system side (downstream), making it essential for protecting sensitive equipment from moisture until activation.
The DCT26 Deluge Valve is ideally suited for deployment in high-hazard areas like chemical storage tanks, aircraft hangars, power transformers, and anywhere immediate, complete saturation by water is required for fire knockdown. Its proven fast-opening mechanism and dependable isolation make it a preferred choice for engineers seeking a high-integrity, standards-compliant solution for critical process and property protection.
In summary, the DCT26 Deluge Valve offers an optimal combination of instantaneous flow delivery, large-volume suppression capacity, and reliable hydraulic actuation. With its fast-acting control mechanism, durable construction, and focus on immediate system response, this unit stands as a trusted solution for modern fire protection and life safety requirements worldwide.
1. General Information
The DCT26 Deluge Valve is designed for installation on the main system riser, requiring precise vertical alignment and secure connection to the water supply and detection trim piping. Proper installation is essential to guarantee safe operation, long service life, and immediate activation capability.
2. Safety Precautions
Installation must be performed by qualified personnel only, typically licensed fire protection contractors.
Ensure strict compliance with all local fire codes, NFPA standards, and safety regulations concerning connecting to pressurized fire water mains and handling heavy components.
Wear appropriate personal protective equipment (PPE).
Confirm that the fire water main section is fully isolated, depressurized, and drained before attempting to install the DCT26 Deluge Valve.
3. Pre-Installation Checklist
Inspect the DCT26 Deluge Valve for any visible damage during transport or storage, paying attention to the clapper assembly and trim connections.
Check that the valve type, size, and pressure rating match the system requirements.
Verify that the main valve interior and clapper seating area 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 around the valve for connecting the deluge trim, detection lines, and reset mechanisms.
4. Installation Procedure
Positioning: Install the DCT26 Deluge Valve vertically on the main riser, ensuring the flow direction adheres to the arrow cast on the body.
The deluge trim (manual release, pressure switches, quick-opening device) must be installed according to the manufacturer’s hydraulic schematic.
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 external trim and the detection line interfaces securely.
5. Post-Installation
Slowly reintroduce water pressure to the supply side (below the clapper), pressurizing the control chamber (above the clapper) via the trim piping.
If leakage is detected, depressurize the system immediately and re-tighten the bolts or secure the trim connections.
Verify the system is fully pressurized and the valve is correctly latched (clapper seated) in the standby position.
Record the installation details, set pressure, and final notes for documentation purposes.
Proper maintenance extends the service life of the DCT26 Deluge Valve and ensures reliable system activation and flow delivery. Follow the guidelines below to maximize the longevity and readiness of this essential unit.
1. Routine Operation
Visually inspect the DCT26 Deluge Valve and all associated trim piping and detection lines regularly (e.g., weekly) for signs of external leakage or damage.
Check the system pressure gauges to ensure static pressure is maintained equally in the supply and control chambers, indicating the clapper is seated and ready.
2. Inspection Schedule
Monthly, check the area surrounding the valve for signs of external leakage.
Quarterly, check the cleanliness of the pilot line strainers and the manual release valve.
Annually, perform a mandatory “full flow trip test” (wet test) to verify the automatic detection system (if hydraulic) reliably vents the control chamber and the main clapper opens completely under flow.
3. Lubrication
The internal moving parts (main clapper hinge) of the DCT26 Deluge Valve are generally water-lubricated.
No external lubrication is required for the internal components.
4. Seal and Gasket Replacement
Replace the main clapper seal (gasket) and the housing gaskets immediately if internal leakage (false trip or flow to the system side) is observed during static pressure testing.
Trim piping seals should be replaced if external leakage is detected.
Always isolate the system water supply and fully bleed the pressure from the control and system sides before attempting any maintenance work requiring cover removal.
5. Cleaning
Keep the exterior of the DCT26 Deluge Valve and its complex trim assembly clean to prevent surface corrosion and ensure all components are visible and accessible.
Ensure the control line components (strainers, restrictors) are flushed periodically to maintain precise hydraulic control function.
6. Storage and Spare Parts
Store spare parts (clapper seals, gaskets, quick opening devices, trim components) in a dry, clean, and cool environment, away from direct sunlight and temperature extremes.
Maintain a detailed record of all inspections, trip tests, and repairs performed on the DCT26 Deluge 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 DCT26?
What are the main advantages of this valve?
The DCT26 Deluge Valve provides instantaneous, simultaneous water discharge from all connected nozzles, which is essential for rapidly controlling and suppressing high-hazard fires over a wide area.
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.
What role does the detection system play in the activation of the DCT26 Deluge Valve?
The detection system (e.g., heat, smoke, or UV sensors) is separate from the piping system but is responsible for sending the signal (via a hydraulic or pneumatic trigger) that causes the control chamber pressure to collapse, thereby opening the main deluge valve.
How is the DCT26 Deluge Valve reset after an activation or test?
The DCT26 Deluge Valve must be manually reset. This involves ensuring the detection system is restored, closing the main water supply, manually seating the main clapper, and then restoring the control pressure above the clapper.
What is the difference between a Deluge System and a Wet Pipe System?
A Wet Pipe System has water in the pipes at all times. A Deluge System uses a DCT26 Deluge Valve to hold water back until a separate detector confirms a fire, at which point all nozzles discharge water simultaneously for mass coverage.
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