Product Overview
WPH Series Stainless Steel Woltman Water Meter – High-Volume Flow Measurement for Industrial and Municipal Applications
The WPH Series is a horizontal helical vane (Woltman) water meter designed for high-volume flow measurement in industrial pipelines, municipal main lines, and commercial complexes . Featuring a robust stainless steel construction (304/316/316L available), this meter delivers exceptional durability and corrosion resistance in demanding environments. The Woltman principle utilizes an axial flow design, where water flows parallel to the turbine axis, enabling high flow capacity with minimal pressure loss . Available in nominal sizes from DN50 to DN300 (2" to 12"), with flanged connections conforming to international standards (ANSI, DIN, JIS, or GB). The hermetically sealed dry dial register ensures clear, fog-free reading, while the removable measuring mechanism allows for easy maintenance without removing the meter body from the pipeline . Ideal for water treatment plants, industrial process lines, irrigation networks, and secondary network master metering.
Key Features
- Robust Stainless Steel Construction – Housing available in 304, 316, or 316L stainless steel; provides superior corrosion resistance for aggressive water environments and extends product service life .
- Woltman Measuring Principle – Axial flow design with helical vane rotor enables high flow capacity (up to 2.5x that of multi-jet meters) while maintaining low pressure loss .
- Hermetically Sealed Dry Dial – Counter is vacuum-sealed to prevent condensation and fogging, ensuring clear, long-term readability .
- Removable Measuring Mechanism – Internal mechanism can be extracted for inspection, cleaning, or replacement without removing the meter body from the pipeline – significantly reducing maintenance downtime .
- Stainless Steel Ball Bearings – Precision rolling bearings reduce friction, improve sensitivity, and ensure accurate measurement of low flow rates .
- Built-In Stainless Steel Strainer – Integrated filter protects the measuring mechanism from debris, ensuring long-term stable operation even in challenging water conditions .
- High-Wear Resistant Bearing System – Aviation-grade jewel bearings combined with high-hardness alloy shaft ensure long-term stability and reliability, significantly increasing maximum flow capacity .
- Corrosion-Protected Housing – Stainless steel fasteners and internal/external epoxy powder coating maximize rust prevention and extend product lifespan .
- Optional Tamper-Proof Cover – Prevents unauthorized access to the measuring mechanism, providing maximum protection against water theft .
- Multiple Output Options – Pulse output (reed switch), photoelectric direct reading, RS485 Modbus, M-Bus, LoRaWAN, NB-IoT, or GPRS for remote monitoring and AMR integration .
- Optional Pressure Sensor – Can be equipped with integrated pressure sensor for network monitoring applications .
Typical Applications
The WPH Series is specifically engineered for high-volume, continuous flow applications:
| Sector | Application Examples |
|---|---|
| Municipal Water Supply | Main line metering, district metering areas (DMA), pressure zone monitoring, bulk water transmission |
| Industrial Facilities | Factory water intake, process water lines, cooling water circuits, utility monitoring |
| Commercial Complexes | Central plant metering, irrigation systems, fire protection mains |
| Residential Developments | Community master meters, new residential complex water supply, secondary network metering |
| "Three Supplies and One Industry" Projects | Retrofitting old residential areas with centralized meter management |
| Agricultural Irrigation | Large-scale irrigation networks, farm water supply systems |
| Water Treatment Plants | Raw water intake, treated water outlet, filter backwash lines |
| HVAC & District Energy | Chilled water distribution, condenser water loops, thermal plant metering |
Operating Principle & Supply Conditions
1. Measurement Method:
The WPH meter operates on the Woltman (horizontal helical vane) principle: water flows axially through the meter body, driving a helical vane rotor. The rotational speed, directly proportional to flow rate, is transmitted through a magnetic coupling to a hermetically sealed dry dial register. This design isolates the counting mechanism from the water stream, ensuring long-term reliability. The axial flow path enables high flow capacity with minimal pressure loss, making it ideal for applications with relatively stable flow conditions .
2. Supply Conditions:
- Minimum Order Quantity: Single units available for evaluation; volume pricing for quantities ≥10 pieces.
- Production Timeline: 15–25 working days for standard configurations; 30–40 days for custom flange specifications or OEM orders.
- Packaging Method: Individual protective wrapping within reinforced cartons; wooden crates with foam inserts for large diameters (≥DN150) or bulk shipments.
- Accepted Payment Methods: Wire transfer (T/T), confirmed irrevocable letter of credit (L/C), PayPal for sample orders.
- Global Logistics: Ocean freight (FCL/LCL), air cargo, or express courier (DHL, FedEx, UPS, TNT) arranged door-to-door with complete documentation.
Technical Specifications
| Parameter | Value |
|---|---|
| Measuring Principle | Woltman (horizontal helical vane), axial flow, magnetic drive |
| Accuracy Class | Class 2 (as defined by ISO 4064) |
| Flow Direction | Axial (parallel to pipe axis) |
| Pressure Loss | Low pressure loss – δP63 |
| Register Sealing | IP68 (hermetically sealed, vacuum-filled, anti-fog) |
| Temperature Classes | T50 (cold water: 0.1°C – 50°C) / T90 (hot water: 0.1°C – 90°C) |
| Pressure Level | MAP10 (1.0 MPa / 10 bar) standard; higher pressure ratings available on request |
| Flow Profile Sensitivity | Upstream sensitivity: U5, U10, U0; Downstream sensitivity: D0, D5 |
| Electromagnetic Environment | E1 (residential, commercial, light industrial) |
| Environmental Class | Class B (fixed indoor/outdoor installation) |
| Body Material Options | 304 stainless steel / 316 stainless steel / 316L stainless steel |
| Fasteners | Stainless steel |
| Surface Protection | Epoxy powder coating internal and external |
| Bearing System | Aviation-grade jewel bearings + high-hardness alloy shaft |
Technical data sheet
|
Nominal Diameter (mm) |
Accuracy Class (Q3/Q1) |
Overload Flow Q4 (m³/h) |
Normal Flow Q3 (m³/h) |
Transitional Flow Q2 (m³/h) |
Minimum Flow Q1 (m³/h) |
|
50 |
50 |
31.25 |
25 |
0.8 |
0.5 |
|
65 |
50 |
50 |
40 |
1.28 |
0.8 |
|
80 |
50 |
78.75 |
63 |
2.016 |
1.26 |
|
100 |
50 |
125 |
100 |
3.2 |
2.0 |
|
125 |
50 |
200 |
160 |
5.12 |
3.2 |
|
150 |
50 |
312.5 |
250 |
8.0 |
5.0 |
|
200 |
50 |
500 |
400 |
12.8 |
8.0 |
|
250 |
50 |
787.5 |
630 |
20.16 |
12.6 |
|
300 |
50 |
1250 |
1000 |
32 |
20 |
Dimensions
|
Nominal Diameter (mm) |
Length L (mm) |
Width B (mm) |
Height H (mm) |
Bolt Hole Center D1 (mm) |
Flange Outer Diameter D2 (mm) |
Bolt Size |
|
50 |
200 |
165 |
215 |
125 |
165 |
4-M16 |
|
65 |
200 |
185 |
223 |
145 |
185 |
4-M16 |
|
80 |
225 |
200 |
233 |
160 |
200 |
8-M16 |
|
100 |
250 |
220 |
288 |
180 |
220 |
8-M16 |
|
125 |
250 |
250 |
298 |
210 |
250 |
8-M16 |
|
150 |
300 |
285 |
342 |
240 |
285 |
8-M20 |
|
200 |
350 |
340 |
369 |
295 |
340 |
8-M20 / 12-M20 |
|
250 |
450 |
395 |
433 |
350 |
395 |
12-M20 / 12-M24 |
|
300 |
500 |
445 |
456 |
400 |
445 |
12-M20 / 12-M24 |
Customer Factory Visit
Support Factory Customization
international certifications
WINMETER – Precision Flow Measurement, Engineered for Industry!
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