IHP Valve & DHP Valve Based Fire Suppression Systems – Precision-Controlled Clean Agent Protection

Our IHP (Indirect High-Pressure) and DHP (Direct High-Pressure) valve-based fire suppression systems deliver precise, reliable fire protection for critical electrical and industrial assets.

• DHP System (Direct High Pressure): Clean agent or gas is released directly through the detection tube when it bursts at the fire source, enabling instant discharge at the origin of heat. Ideal for enclosed cabinets, electrical panels, CNC machines, and compact equipment.

Applications & Uses of DHP System (Direct High Pressure)

The DHP System (Direct High Pressure) is designed for localized, equipment-level fire suppression, especially where fires start in confined, critical zones. The system uses high-pressure clean agent discharge directly from the burst detection tube, targeting the exact ignition point.

Primary Applications

• Electrical Panels & Control Cabinets
  Protects MCC panels, LT/HT panels, PLC cabinets, VFD panels, and automation control boards.

• CNC & Industrial Machinery
  Ensures immediate suppression at the point of fire within CNC machines, lathes, milling machines, and robotic cells.

• Server Racks & IT Cabinets
  Ideal for enclosed telecom racks, data center micro-cabins, UPS cabinets, and network distribution boxes.

• Battery Systems & BESS Modules
  Used in lithium-ion battery packs, EV battery cabinets, inverter cabinets, and battery storage units.

• Lab & Medical Equipment
  Suitable for sensitive electronic devices that require non-conductive, residue-free suppression.

Typical Use-Cases

• Prevents short-circuit fires in electrical enclosures.

• Stops ignition caused by overheating components and wiring.

• Provides 24×7 automatic protection without human intervention.

• Ideal where limited space prevents traditional systems.

• Ensures quick installation on-site with minimal downtime.

• Perfect for OEM integration into machines or cabinets.

Why DHP is Preferred

• Instant suppression at the fire origin.

• No electrical shutdown needed for installation.

• Clean agent discharge—non-conductive & residue-free.

• Compact, reliable, and maintenance-friendly.

 

• IHP System (Indirect High Pressure): Detection tube senses heat and ruptures, triggering a dedicated release valve to discharge the agent through strategically placed nozzles for full area coverage. Ideal for larger cabinets, machinery rooms, control panels, battery banks, and industrial enclosures requiring distributed suppression.

Both systems provide non-conductive, residue-free suppression, high reliability, 24/7 readiness, and quick installation, making them suitable for demanding industrial, commercial, and automation environments.

Applications & Uses of IHP System (Indirect High Pressure)

The IHP System (Indirect High Pressure) offers controlled, distributed fire suppression for larger enclosures and equipment where localized spot discharge (DHP) is not sufficient. When the detection tube senses heat and ruptures, it activates a high-pressure release valve that discharges the clean agent through pre-engineered nozzles, delivering optimized coverage.

---

Primary Applications

1. Large Electrical & Control Panels

Used in MCC panels, switchgear rooms, distribution boards, VFD panels, PLC cabinets, and transformer control cabinets where multiple zones need uniform coverage.

2. Industrial & Process Machinery

Ideal for large machines with multiple heat sources—CNC machining centers, automated production lines, printing machines, injection molding machines, packaging lines, etc.

3. Battery Rooms & BESS Enclosures

Suitable for lithium battery systems, inverter cabinets, ESS modules, UPS rooms, and energy storage banks requiring multi-point suppression.

4. Server Rooms & Network Cabinets

Used in micro-data centers, telecom shelters, server rooms, and IT racks that require area-based suppression instead of single-point protection.

5. Electrical Control Rooms & Equipment Rooms

Applies for smaller control rooms, panel rooms, HVAC plant rooms, generator control rooms, and pump rooms.

---

Typical Use-Cases

• Distributed suppression for multi-compartment panels

• Protection for large enclosures with airflow

• Coverage for areas with multiple ignition points

• Fire suppression for equipment that cannot be protected by direct tube burst discharge

• Ideal for manufacturing units, OEM installations, utilities, BTS shelters, and EV infrastructure

• Ensures protection in environments where electrical short circuits or overheating components cause fire spread

---

Advantages of IHP System

• High-pressure activation ensures quick response

• Clean agent discharge through engineered nozzles for maximum coverage

• Non-conductive & residue-free agent—safe for electronics

• Scalable for larger or multiple-zone equipment

• 24×7 active protection, maintenance-friendly & easy to retrofit

Detailed Technical Difference Between DHP and IHP Fire Suppression Systems

Tube-based automatic fire suppression systems are built around two key technologies: DHP (Direct High Pressure) and IHP (Indirect High Pressure). Both use a heat-sensitive detection tube, but their activation mechanisms, discharge patterns, and applications differ significantly. Below is an in-depth breakdown.

---

1. Operating Principle

DHP System – Direct High Pressure

• The detection tube itself is both sensor + discharge line.

• When exposed to heat (~110–180°C depending on tube spec), the tube ruptures at the exact fire source.

• The sudden pressure drop releases the clean agent directly from the tube opening.

• Discharge is localized, right at the ignition point.

IHP System – Indirect High Pressure

• The detection tube works only as a sensing line, not a discharge line.

• When it bursts, pressure drop triggers a high-pressure valve mounted on the cylinder.

• The agent is then expelled through pre-engineered discharge nozzles.

• Discharge is distributed, covering a wider area.

---

2. Suppression Mechanism

DHP System

• Localized discharge from the burst point.

• Clean agent is directed exactly where fire begins — offering rapid spot suppression.

• Effective for single ignition-point fires within small enclosures.

IHP System

• Clean agent flows through metal nozzles.

• Nozzle design enables 360° spread, fog pattern, or cone-shaped discharge depending on system design.

• Ideal where multiple ignition points exist or where airflow spreads the fire.

---

3. Area Coverage & Application Size

DHP

• Designed for small, confined spaces, typically < 1m³.

• Suitable for compact electrical panels, battery cabinets, server racks, or CNC compartments.

IHP

• Covers larger enclosures, up to several cubic meters.

• Ideal for MCC rooms, bigger machinery, multi-compartment panels, BESS modules, and cabinets with ventilation.

---

4. Components & Hardware Differences

DHP System Components

• Single clean agent cylinder

• Detection tube

• Fittings & clamps

• Basic pressure monitoring (optional)

• No nozzles or release valves required

IHP System Components

• Clean agent cylinder with high-pressure release valve

• Detection tube

• Distribution network (metal pipes)

• Nozzles (1–4 typically depending on volume)

• Pressure gauge, pressure switch, optional solenoid

• Advanced fittings & manifold

---

5. Complexity & Engineering Requirements

DHP

• Very simple.

• Quick installation.

• No hydraulic calculations.

• Minimal maintenance.

IHP

• Requires nozzle placement planning.

• Requires volume calculation for enclosures.

• Needs back pressure and flow calculation.

• Periodic nozzle inspection & alignment checks.

---

6. Response Time

DHP

• Fastest response because discharge happens instantly at the burst point.

• Tube rupture creates immediate release — ideal for high-energy sparks or electrical short-circuits.

IHP

• Slightly slower due to sequence: Tube burst → valve activation → agent travels through pipes → discharge.

• Still very fast within seconds, but not as instantaneous as DHP.

---

7. Safety Considerations

DHP

• Local discharge reduces overall agent consumption.

• Best suited where fires are predictable at a single hotspot.

IHP

• Ensures uniform flooding in larger cabinets.

• Prevents re-ignition by filling the enclosure with agent.

---

8. Typical Use-Case Comparison

Parameter	DHP (Direct High Pressure)	IHP (Indirect High Pressure)
Enclosure Volume	Small	Small-to-Large
Fire Spread	Single point	Multiple points
Activation	Tube bursts → Agent exits tube	Tube bursts → Valve releases agent → Nozzles discharge
Installation	Very easy	Requires planning
Maintenance	Low	Moderate
Applications	Panels, CNC, server racks, battery cabinets	MCC panels, switchgear, BESS rooms, large machines
Discharge Pattern	Localized	Distributed

---

Final Professional Summary

• Choose DHP when you need extremely fast, localized fire suppression inside small cabinets with clear ignition sources.

• Choose IHP when the enclosure is bigger, airflow is present, or multiple heat sources exist — IHP provides distributed and controlled suppression through nozzles.