Why Is Precise Water Management Inseparable from Modern Water Meter Technology?
As global water scarcity intensifies, the demand for accurate and durable water meters is surging across residential, industrial, and commercial sectors. Among various types, the Single-Jet Dry Type Water Meter has emerged as a market favorite due to its unique design. This guide breaks down its core advantages, applicable scenarios, and common concerns to help you make an informed decision.
What Is a Single-Jet Dry Type Water Meter?
The Single-Jet Dry Type Water Meter is a single-channel turbine metering device characterized by:
Single-Jet Design: Water enters through a single inlet, driving the impeller and simplifying the internal structure.
Dry-Type Movement: The register is completely isolated from water flow, preventing water-induced mechanical failures.
Working Principle: Water drives the impeller → Magnetic coupling transmits motion → Register displays accumulated flow. No direct contact between wet and dry components.
Top 5 Advantages of the Single-Jet Dry Type Water Meter
Extended Lifespan: Corrosion-Resistant Design Boosts Durability by Over 50%
Dry-Type Isolation: The register is sealed off from water, avoiding gear corrosion common in wet-type meters.
Material Upgrades: The impeller is made from high-strength engineering plastics (e.g., POM) or stainless steel; magnetic parts use NdFeB magnets for triple the wear resistance.
Field Data: In municipal projects, average service life reaches 10–15 years (versus 6–8 years for wet meters).
User Value: Reduces replacement frequency, lowering long-term procurement and labor costs.
Low-Pressure Sensitivity: Accurately Measures Even the Smallest Flows
Efficient Single-Jet Design: Concentrated water flow drives the impeller even at ultra-low flow rates (≥0.01 m³/h), addressing the “dripping doesn’t count” issue of traditional meters.
Technical Details: Optimized bearing structure reduces friction coefficient below 0.1; starting torque is one-third that of wet meters.
Use Cases: Detects faucet leaks (saves 1–2 tons/month) and small commercial flows (e.g., hand-washing stations).
Standards Compliance: Meets ISO 4064 Class B with ±5% minimum flow error.
Zero-Maintenance Design: IP68 Protection for Hassle-Free Use
Dry Chamber Advantage: Ideal for areas difficult to access (e.g., underground vaults, high-rise service shafts).
IP68 Waterproofing: Withstands 1.5m water immersion for 30 minutes—reliable even in rainstorms or humid conditions.
Self-Cleaning Design: Single-flow path prevents sediment buildup; filter cleaning interval extends beyond 5 years.
Case Study: A hotel group reduced annual maintenance costs by 70% after adoption.
Smart Integration: Seamlessly Connects to Digital Water Systems
Connectivity Options: Supports photoelectric reading or pulse outputs (M-Bus, LoRaWAN) for remote metering and real-time monitoring.
Data Sync: Flow data integrates with apps or cloud platforms; alerts for anomalies like burst pipes.
Policy-Ready: Meets smart city standards (e.g., EU MID certification, China NB-IoT compliance).
Business Benefit: Cuts labor costs and improves operational efficiency for property managers.
High Cost-Performance Ratio: Reduces Total Costs by Over 30%
Manufacturing Efficiency: Simplified structure and modular production reduce costs versus multi-jet models.
Lower Procurement Price: 15%–20% cheaper than alternatives.
Easy Installation: 30% smaller footprint fits tight spaces (e.g., under sinks); installs in half the time.
Energy Savings: Low pressure loss (0.063 MPa) reduces pump load over time.
Installation & Maintenance Guide: From Site Selection to Troubleshooting
Pre-Installation Checklist
Tools & Materials:
Pipe wrench, thread seal tape/sealant, level, pipe cutter
Required fittings: flange/threaded connectors, filter (if water is sandy)
Safety gear: gloves, goggles
Site Considerations:
Choose accessible, straight pipe sections away from vibrations (e.g., pump rooms).
Space: Leave straight pipe lengths (10×DN before, 5×DN after); e.g., 150mm before a DN15 meter.
Temperature: Standard meters operate between 0°C–40°C; use frost-resistant models in colder climates (down to -30°C).
Step-by-Step Installation (Diagrams Recommended)
Step 1: Pipe Preparation
Cut old pipe cleanly, deburr edges, sand joints.
Install a pre-filter if needed (recommended ≥60 mesh).
Step 2: Meter Positioning
Align with flow direction; arrow must match water flow. Max tilt: 3° (use a level).
For threaded connections, wrap thread seal clockwise 5–8 turns to avoid clogging.
Step 3: Pressure Testing
Gradually fill and pressurize up to 1.6 MPa; hold for 15 mins to check for leaks.
For flange types, tighten bolts diagonally to 15–20 N·m torque.
Routine Maintenance & Troubleshooting
| Interval | Task | Method |
| Monthly | Check glass for cracks, verify register movement | Visual check |
| Every 6 months | Clean filter (if present) | Remove and rinse screen |
| Every 2 years | Check O-rings for aging | Lubricate or replace |
Common Issues & Fixes:
Not Counting:
Check flow direction
Inspect impeller for debris (shut valve before disassembly)
Over-Reading:
Bleed air from the line
Check for unauthorized usage (e.g., hidden leaks)
Condensation or Leaks:
Stop usage immediately
Replace seals or housing
Temporary fix: apply waterproof adhesive
Critical Precautions
Do Not:
Use open flame to defrost (use insulation or heating tape)
Remove meter without closing upstream valve
Accuracy Tips:
Avoid installing near magnetic fields >50mT (e.g., motors <1m away)
After long inactivity, flush slowly for 5 minutes before use
Google FAQs About Single-Jet Dry Type Water Meters
Q1: Can it be installed vertically? Does it affect accuracy?
A: Yes, as long as flow is bottom-up; accuracy deviation stays within ±1%.
Q2: Does self-installation void the warranty?
A: Must be installed by certified professionals with records, or warranty may be voided.
Q3: How to prevent freezing in winter?
A: Wrap with rubber-foam insulation (≥20mm), and install heating tape (15W/m, with temperature control).
Q4: Single-Jet vs. Multi-Jet—Which lasts longer?
A:
Single-Jet: Simple structure, 80% lower blockage risk, ideal for poor-quality water.
Multi-Jet: Prone to sediment buildup; higher maintenance costs.
Conclusion: Single-Jet lasts 10–15 years in average water quality; Multi-Jet lasts 8–12 years.
Q5: Can it be used in hot water pipelines?
A:
Standard version: Cold water only (≤40°C); high temps deform plastic impellers.
High-temp version: Ceramic impeller + stainless bearing; rated to 90°C; ~20% price increase.
Warning: Using the standard version on hot water voids warranty.
Q6: Will strong magnetic fields affect accuracy?
A:
Shielded with dual-layer casing (metal shell + silicon steel lining).
Impeller made from non-magnetic material (POM plastic).
Only fields >50mT (e.g., industrial motors <1m) may cause interference.
Q7: Is professional installation legally required?
A:
Many countries require certified plumbers (e.g., ASSE in the US, GB/T 778 in China).
Risks: Leaks from poor sealing, flow direction errors, and warranty loss.
Q8: What issues require immediate meter replacement?
A:
No response at minimum flow (e.g., dripping)
Water leakage or fogging inside the glass
Measurement error > ±5% (check via container test: e.g., 1 ton of actual water measures <0.95 or >1.05 tons)
Q9: Is it compatible with smart home systems?
A:
Basic version: Mechanical only; manual reading needed
Smart version: Supports protocols below (verify before purchase):
| Protocol | Range | Suitable For |
| M-Bus | ≤1km (wired) | Apartment complexes |
| LoRaWAN | 2–5km (wireless) | Rural supply systems |
| NB-IoT | Cellular | Urban smart water systems |
