Constant Flow Nozzle
Automatic Pressure-Compensating Fog Nozzle | 150-600 LPM Variable Flow | Brass & Aluminum Construction | Pistol Grip | Spinning Teeth 140° Fog | Forgives Pump Operator Errors
Product Overview
The Constant Flow Nozzle is an automatic pressure-compensating fog nozzle featuring an internal spring-loaded baffle mechanism that maintains constant gallonage (150-600 LPM) across inlet pressure variations of 5-7 kg/cm² (71-100 PSI). This intelligent design forgives pump operator errors by automatically adjusting the discharge orifice size: higher inlet pressure pushes the baffle forward (expanding the opening), while lower pressure allows the spring to contract the opening—maintaining ±5% flow accuracy regardless of friction loss, elevation changes, or water supply fluctuations.
Ideal for volunteer fire departments with limited training time, multi-company mutual aid operations, and industrial fire brigades, this nozzle eliminates the need for complex hydraulic calculations. The pump operator simply maintains 100 PSI discharge pressure, and the nozzle handles the rest. Available in aluminum (lightweight, corrosion-resistant) and brass (traditional durability, impact-resistant) construction, both featuring spinning teeth fog generation (140° maximum cone), pistol grip ergonomics, and continuous flow adjustment via control ring. Perfect for foam operations where consistent eductor flow ensures accurate proportioning.
Technical Specifications
🔧 Configuration Options
Aluminum Alloy | 150-600 LPM Variable | Automatic Pressure Compensating | Pistol Grip | Spinning Teeth 140° Fog | 30m Hollow Jet | 10.5 kg Weight
| Parameter | Specification |
|---|---|
| Model Number | KFP-HNCF-AL-600 |
| Product Description | Constant Flow Nozzle (Automatic Pressure-Compensating Fog Nozzle) - Pistol grip with spring-loaded baffle maintaining constant gallonage, spinning teeth fog, hollow jet/spray patterns |
| Flow Capacity Range | 150-600 LPM (40-160 US GPM) continuously variable via flow control ring |
| Automatic Pressure Compensation | ±5% flow accuracy maintained across 5-7 kg/cm² (71-100 PSI) inlet pressure range |
| Recommended Operating Pressure | 7 kg/cm² (100 PSI) nozzle inlet pressure |
| Working Pressure Range | 5-7 kg/cm² automatic compensation | Maximum: 10 kg/cm² |
| Inlet Connection | 63mm Male Instantaneous per BS 336 / IS 903 |
| Discharge Patterns | Hollow Jet (30m throw) | Narrow Fog 30-50° | Wide Fog 70-140° | Complete Shutoff |
| Pattern Adjustment | Rubber bumper rotation: Jet → Narrow Fog → Wide Fog continuous |
| Flow Control | Rotating ring with graduations (150-200-300-400-500-600 LPM) |
| Nozzle Body Material | Aluminum Alloy - Lightweight 10.5 kg, corrosion-resistant |
| Deflector Material | Brass spinning teeth (8-12 individual teeth) |
| Internal Baffle | Stainless Steel 304 with calibrated compression spring |
| Pistol Grip Handle | Rubber Molded - Ergonomic non-slip design |
| Shutoff Handle | Trigger bail (3-5 kg force), instant shutoff |
| Weight | 10.5 kg (23.1 lbs) - Balanced near pistol grip |
| Overall Length | 380-420mm depending on bumper position |
| Nozzle Reaction Force | 25-35 kg at 600 LPM maximum flow |
| Finish | Natural aluminum or hard anodized (Type II, 10-25 micron) |
| Testing Standards | BS 336 / IS 903 coupling | Flow testing at 7 kg/cm² | Automatic compensation verification |
| Service Life | 10-15 years municipal service with proper maintenance |
| Warranty | 12 months - Automatic compensation, structural integrity, trigger operation |
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Key Features & Benefits
Automatic Pressure Compensation
- Spring-loaded baffle maintains constant gallonage ±5% across 5-7 kg/cm² inlet pressure range
- Forgives pump operator errors - no complex hydraulic calculations required
- Higher pressure pushes baffle forward (expanding opening), lower pressure contracts opening automatically
- Ideal for extended hose lays, relay pumping, elevated operations, simultaneous attack lines
Operational Simplicity
- "Set and forget" operation - firefighter rotates flow ring, opens bail, nozzle delivers selected flow
- Minimal training: Pump operator maintains 100 PSI standard discharge regardless of nozzle setting
- Eliminates communication breakdown risks between nozzle and pump operators
- Perfect for volunteer departments, multi-company mutual aid, industrial fire brigades
Continuous Flow Adjustment
- Variable 150-600 LPM adjusted via control ring - infinite settings within range
- Flow adjustment during operations without pump coordination - baffle responds in 1-2 seconds
- Water conservation: Rotate ring down after knockdown (600→300 LPM for overhaul)
- Single nozzle serves all scenarios: exposure protection, residential, commercial, defensive
Spinning Teeth Wide-Angle Fog
- Brass deflector with 8-12 spinning teeth creating 70-140° maximum wide fog cone
- Self-adjusting pattern: If debris blocks one tooth, others maintain pattern integrity
- Hollow jet mode: 30-meter throw at 400 LPM for direct attack operations
- Reduced erosion wear - spinning distributes wear, extending deflector life 7-12 years
Testing & Quality Parameters
🔬 Manufacturing Quality
- 63mm coupling thread GO/NO-GO gauge verification per BS 336 / IS 903
- Baffle spring calibration: ±5% flow accuracy across 5-7 kg/cm² pressure range
- Material composition verification: Aluminum alloy or brass spectrometer analysis
- Trigger bail testing: 3-5 kg force, instant return, zero leakage at 10 kg/cm²
- Weight confirmation: 10.5 kg ±100g tolerance
🔧 Automatic Compensation Testing
- Flow accuracy at multiple settings (150-300-400-600 LPM) across 5-7 kg/cm² range
- Pressure sweep testing: Flow maintained ±5% throughout pressure variations
- Baffle response time: <2 seconds adjustment to pressure changes
- Hollow jet throw: 28-32 meters at 400 LPM, 7 kg/cm² pressure
- Fog pattern uniformity: No heavy/light sectors, spinning teeth all operational
🎨 Finish Quality & Marking
- Aluminum: Natural finish or Type II anodizing 10-25 micron thickness
- Brass: Natural brass or chrome plating 15-25 micron over nickel undercoat
- Optional powder coating: 80-120 micron thickness in custom colors
- Flow ring markings: Laser engraved 0.2-0.5mm depth for permanence
- Model identification: KFP / HNCF-AL or HNCF-BR / Year / Serial number
Compliance & Standards
Our Constant Flow Nozzle meets quality standards for professional firefighting operations:
Fire hose coupling compatibility
Flow accuracy 5-7 kg/cm² range
Material specifications
Industry-leading fog coverage
Quality Management System
15 kg/cm² hydrostatic (optional)
Global Export Footprint
Supplying automatic pressure-compensating nozzles to fire departments & industrial facilities worldwide
Trusted across 26+ countries for operations requiring simplicity and pressure forgiveness
🌍 Middle East & GCC
🌍 Africa
🌏 Asia Pacific
🇪🇺 Europe
🌎 Americas
🏆 Why Choose Kinde Fire
- Genuine Automatic Mechanism: Precision spring-loaded baffle maintains ±5% flow accuracy across 5-7 kg/cm² pressure range, proven through pressure sweep testing showing horizontal flow lines—distinguishing genuine automatic from inferior products claiming "automatic" but delivering pressure-dependent flow.
- Operational Simplicity: Eliminates pump-nozzle coordination requirements. Pump operator maintains 100 PSI standard discharge, nozzle automatically compensates for friction loss, elevation, simultaneous lines. Ideal for volunteer departments with limited training time.
- Foam Eductor Compatibility: Automatic flow maintenance ensures eductor receives consistent 400-600 LPM maintaining accurate 3-6% foam concentrate proportioning despite pressure variations—critical for Class B fire suppression effectiveness.
- Dual Material Options: Aluminum (lightweight, corrosion-resistant) and Brass (impact-resistant, thermal stability) both priced $220-320 enabling selection based on operational requirements rather than budget constraints.
- Complete Documentation: Flow testing data, automatic compensation verification (pressure sweep charts), material certificates, baffle spring calibration specs, operation manuals, ISO 9001:2015, 12-month warranty covering automatic function.
- Export-Ready Packaging: 3-4 weeks manufacturing, sea freight to 26+ countries, complete export documentation including preferential origin certificates for duty reduction (India-UAE CEPA, India-ASEAN saving 10-25% import costs).
Frequently Asked Questions
The spring-loaded baffle operates via hydraulic force balance. Higher inlet pressure (7 kg/cm²) creates greater hydraulic force pushing the baffle forward, expanding the discharge orifice and allowing more water to exit—maintaining constant nozzle pressure and rated flow despite elevated inlet. Lower inlet pressure (5 kg/cm²) reduces hydraulic force, allowing the spring to push the baffle backward, contracting the orifice and maintaining flow despite reduced pressure. The baffle continuously repositions in real-time (response <2 seconds) tracking pressure fluctuations automatically.
Maintenance: Annual baffle spring inspection (check for compression set >10% indicating fatigue), O-ring replacement around baffle shaft every 2-3 years (prevents leakage compromising hydraulic force balance), cleaning baffle sliding surfaces (remove debris/corrosion causing binding), and annual flow testing across 5-7 kg/cm² range verifying ±5% accuracy maintained. Symptoms of malfunction: Inconsistent flow across pressure range = spring fatigue or O-ring leakage; Weak stream at low pressure = spring too strong or binding; Excessive flow at high pressure = spring too weak.
Constant Flow Advantages: Operational simplicity (pump operator maintains 100 PSI standard, no calculations), pressure forgiveness (±5% flow accuracy across 28% pressure variation ideal for extended hose lays, relay pumping, elevated operations), foam eductor compatibility (consistent flow ensures accurate proportioning), no pump-nozzle coordination required (eliminates communication delays/errors).
Constant Flow Disadvantages: Higher nozzle reaction forces (25-35 kg vs 22-28 kg Select-O-Flow), increased maintenance complexity (baffle spring service, O-ring replacement, calibration verification), higher cost ($220-320 vs $180-280), heavier weight (10.5 kg vs 2.0-2.3 kg aluminum Select-O-Flow—78% heavier causing faster fatigue).
Choose Constant Flow if: Department prioritizes simplicity over weight (volunteer departments with limited training, multi-company mutual aid, inexperienced pump operators, foam operations). Choose Select-O-Flow if: Department values tactical flexibility and lightweight handling (diverse operations requiring flow selection, water conservation critical, weight reduction priority, pump operators trained/willing to coordinate).
Testing: Flow testing at multiple settings (150-300-400-600 LPM) at 7 kg/cm² using calibrated flow meter traceable to NPL India standards documenting ±5% compliance. Automatic compensation verification (critical): Set nozzle 400 LPM, vary inlet pressure 5-7 kg/cm², document flow maintained 380-420 LPM ±5% with pressure sweep charts showing horizontal flow line confirming baffle functioning—proves genuine automatic versus pressure-dependent flow. Dimensional inspection (63mm coupling GO/NO-GO gauge per BS 336/IS 903), trigger bail testing (force 3-5 kg, zero leakage at 10 kg/cm²), pattern quality (jet throw 28-32m, fog uniformity).
Documentation: Material certificates (aluminum alloy or brass composition, stainless baffle spring, brass deflector), baffle mechanism inspection (spring calibration, O-ring sealing, response time <2 seconds), operation manuals (automatic flow principles, pump operator simplified instructions "maintain 100 PSI", maintenance schedules, troubleshooting), ISO 9001:2015, export documentation (commercial invoice, packing list, certificate of origin for preferential tariffs, material certificates).
Warranty: 12 months covering automatic compensation maintaining ±5% flow accuracy 5-7 kg/cm² range, structural integrity, trigger bail reliability. Claims via WhatsApp +91-8141899444, resolution through replacement components, repair credit, or full nozzle replacement if unrepairable.
Aluminum Advantages: Corrosion-resistant natural oxide layer (no chrome plating maintenance), modern silver/gray aesthetics, lightweight potential if manufacturer redesigns (current datasheet shows 10.5 kg both materials). Considerations: Lower impact resistance (can crack from severe drops vs brass dents), thermal stability concern above 200°C (brass maintains properties to 400-500°C), galvanic corrosion potential in saltwater (aluminum + brass + stainless creates galvanic cell requiring fresh water flushing after marine exposure).
Brass Advantages: Superior impact resistance from ductility (withstands drops without cracking), thermal stability 400-500°C for close-proximity interior attack or high-temperature industrial fires, traditional firefighting heritage (trusted material for decades), marine corrosion resistance when chrome plated (established solution shipboard/offshore/coastal operations). Considerations: Chrome plating maintenance (replating required 8-12 years $80-150 per nozzle maintaining appearance).
Choose Aluminum if: Fresh water operations, moderate service (proper storage reducing drop incidents), low-maintenance preferences. Choose Brass if: Rough service environment (training with frequent drops), high-temperature scenarios, marine/saltwater operations, traditional preferences. Cost-neutral: Both $220-320 enabling selection based purely on operational requirements.
Manufacturing: 3-4 weeks from order confirmation and 40% advance payment. Rush orders 1-2 weeks possible ($50-100 per unit premium) for emergency replacements or critical project deadlines.
Sea Freight Examples: Middle East/GCC - $90-160 per carton (8-10 nozzles = $9-20/unit freight), 12-18 days transit, customs 2-3 days, total landed ~$269/unit Dubai. Africa - $100-180 per carton, 14-20 days transit to Kenya/Tanzania, total landed $280-340/unit. Southeast Asia - $70-130 per carton, 10-16 days to Singapore (regional hub), total landed $260-310/unit. Europe - $170-280 per carton, 20-28 days via Suez, total landed $340-420/unit. Americas - $180-300 per carton, 25-30 days to US East Coast, total landed $360-450/unit.
Air Freight Emergency: $4.00-6.00/kg (10.5 kg nozzle = $42-63 vs $9-20 sea = 2-4× premium), 5-8 days door-to-door. Economical only for emergency replacements or small sample orders 1-2 units where time-critical evaluation justifies premium.
Duties: GCC typically 0-5% (preferential tariffs India-UAE CEPA), other markets 10-25% standard rates. Complete export documentation provided including preferential origin certificates for duty reduction where applicable.
What is a Constant Flow Nozzle?
A Constant Flow Nozzle, professionally termed "Automatic Pressure-Compensating Fog Nozzle," is an intelligent pistol-grip handline nozzle featuring internal spring-loaded baffle mechanism that automatically maintains constant gallonage (150-600 LPM) across inlet pressure variations 5-7 kg/cm² (71-100 PSI). The baffle responds to pressure changes: higher pressure pushes baffle forward expanding discharge opening, lower pressure allows spring to contract opening—maintaining ±5% flow accuracy. This eliminates pump operator hydraulic calculations and nozzle-pump coordination, creating "set and forget" simplicity particularly valuable for volunteer departments, multi-company mutual aid, inexperienced pump operators, foam operations requiring consistent eductor flow, and dynamic fireground conditions where pressure varies from hose advancement, elevation changes, or water supply fluctuations.
Constant Flow Nozzle Manufacturer in India for Export
Kinde Fire (iThing Mechatronics LLP) manufactures Constant Flow automatic pressure-compensating pistol-grip handline nozzles at our ISO 9001:2015 certified facility in Ahmedabad, Gujarat, India, specializing in export to volunteer fire departments, industrial fire brigades, foam operations, and international distributors across 26+ countries including UAE, Saudi Arabia, Kenya, USA, Singapore requiring operational simplicity and pressure variation forgiveness. Our manufacturing employs precision-engineered spring-loaded baffle mechanism maintaining ±5% flow accuracy across 5-7 kg/cm² range (proven through pressure sweep testing showing horizontal flow lines), dual material options aluminum alloy (lightweight, corrosion-resistant) and brass (traditional durability, impact-resistant) both priced competitively $220-320, spinning teeth fog deflector (8-12 brass teeth creating 140° maximum wide fog), continuous flow adjustment 150-600 LPM via control ring, and hollow jet mode 30-meter throw at 400 LPM.
Constant Flow Nozzle Supplier to Volunteer Fire Departments Worldwide
Kinde Fire supplies Constant Flow automatic pressure-compensating handline nozzles globally to applications requiring operational simplicity: Volunteer fire departments (limited training time—automatic nozzles achieve competency 1-2 sessions vs 4-8 sessions manual nozzles, pump operator maintains 100 PSI standard eliminating calculations), multi-company mutual aid (nozzle operators from different departments connecting to unfamiliar apparatus without coordination—"maintain 100 PSI" universally understood), industrial fire brigades (personnel rotation creating training burden—simplified automatic equipment forgives inexperienced operators), foam operations (inline eductor compatibility where automatic flow maintenance ensures consistent 400-600 LPM matching eductor design maintaining accurate 3-6% foam concentrate proportioning despite pressure variations), extended hose lays (rural 100-200+ meter attack lines where friction loss variable during advancement—automatic compensation maintains adequate suppression versus manual nozzles potentially delivering weak streams if pump pressure inadequate). Competitive export pricing $220-320 depending on material/finish/coupling with bulk discounts 15-25% for fleet standardization 50-100+ units, responsive lead times 3-4 weeks manufacturing plus sea freight, and complete documentation (flow testing verifying automatic compensation ±5% with pressure sweep charts, dimensional inspection, material certificates, operation manuals, ISO 9001:2015, 12-month warranty covering automatic function).