SANT / Woltman bulk water meters
WM2
CI Woltman cold; price list 50/65/80/100/150/200/250/300 mm
Class-B, removable mechanism, bolted cover, magnetic drive, 45°C in lists, 1.0 MPa working
MODEL OVERVIEW
What the WM2 offers
- Class-B, removable mechanism, bolted cover, magnetic drive, 45°C in lists, 1.0 MPa working
- PN16-drilled flanges
Manufacturer’s documented description: SANT retail price list, August 2026, pp. 63–66. Options and qualifications above are retained as stated.
Check these document differences
Flow table / temperature
SANT wm2 technical leaflet p.2: DN250 transition flow below minimum; flow-unit headings inconsistent; 50°C in leaflet
SANT August 2026 list p.63: 45°C; corrected size-specific flow table required. No corrected values are inferred here
Request written confirmation for the offered size and configuration before using either value.
TECHNICAL DATA
WM2 specifications
| Parameter | Documented value |
|---|---|
| Measuring principle | woltmanSANT retail price list, August 2026, 63–66 |
| Nominal diameter (DN) | 50, 65, 80, 100, 150, 200, 250, 300S20 · 63 |
| Fluid temperature | Maximum 45°C in retail listS20 · 63 |
| Working pressure and temperature | 1.0 MPa (10 bar)S20 · 63 |
| Connections | DIN2533 RF PN16 drillingS20 · 63 |
| Body material | Cast ironS20 · 63 |
| Standards claim | ISO4064 Class BS20 · 63 |
| Body test pressure | 1.5 MPa hydraulic test; not working pressureS20 · 63 |
Published WM2 body lengths
Source: wm2 sant, undated, p.1. DN 125 appears in this sheet but is not established as a currently quoted size by the price-list record. This sheet says 50°C while the lists say 45°C. Its flow table has ambiguous Qt/Qmin unit headings and is not used here as a sizing schedule.
| DN (mm) | Length (mm) |
|---|---|
| 50 | 200 |
| 65 | 200 |
| 80 | 225 |
| 100 | 250 |
| 125 | 250 |
| 150 | 300 |
| 200 | 350 |
| 250 | 400 |
| 300 | 450 |
SANT WM2: dimensional reference
S37 p.1
DN125 appears in the leaflet but is absent from the price-list size selection. Temperature and flow-table conflicts are documented separately. Confirm the final flange drilling.
| DN (mm) | Length (mm) | Width (mm) | Height (mm) | Flange OD (mm) | PCD (mm) | Bolts | Weight (kg) |
|---|---|---|---|---|---|---|---|
| 50 | 200 | 172 | 247 | 165 | 125 | 4 M16 | 12 |
| 65 | 200 | 185 | 260 | 185 | 145 | 8 M16 | 13 |
| 80 | 225 | 200 | 264.5 | 200 | 160 | 8 M16 | 15 |
| 100 | 250 | 225 | 271.5 | 220 | 180 | 8 M20 | 15 |
| 125 | 250 | 250 | 295 | 250 | 210 | 8 M20 | 23 |
| 150 | 300 | 285 | 301.5 | 285 | 240 | 8 M20 | 30 |
| 200 | 350 | 340 | 358.5 | 340 | 295 | 12 M20 | 42 |
| 250 | 400 | 395 | 413.5 | 395 | 350 | 12 M20 | 51 |
| 300 | 450 | 445 | 463.5 | 445 | 400 | 12 M20 | 63 |
Details to confirm for the offered configuration
These parameters are not established as exact-model values in this record. Some may not apply to this technology.
- Q1 m3 h
- Q2 m3 h
- Q3 m3 h
- Q4 m3 h
- Approvals and scope
DUTY & SELECTION
Where to consider this type
Water drives a helical rotor used for larger flows. Many ranges have flanged bodies and removable measuring inserts.
Installation and commissioning
Before the meter is selected
- Overnight flow and continuous/short peak demand
- Rotor-axis and pipe orientation requirements
- Removable insert service clearance
- Flange drilling, head loss and straight pipe
Before the system is handed over
- Confirm the installation drawing, orientation and access for service.
- Match the actual flow range and permitted pressure loss to the project.
- Record meter serial number, start reading and any output scaling.
- Commission communications against the receiving system and retain the test record.
Reading and communication
No electronic output is established for the base record. Confirm a compatible pickup or communication variant if remote reading is required; do not assume another model’s output can be fitted.
Understand pulse, wired and wireless reading ↗Documents and purchase checks
Read the SANT technical reference → · Browse the source index
Source: SANT retail price list, August 2026, pp. 63–66. Reviewed 2026-09-09.
Ask for these before ordering
- Approved drawing for the exact model, size and configuration
- Serial-number calibration or factory test record
- Applicable approval certificate and exact scope
- Installation manual and required straight pipe
- Protocol/register map and output power requirements
- Option/accessory codes with included components
- Pressure-loss curve, flange drilling and face-to-face length
- Current written commercial and warranty terms
SPECIFY YOUR REQUIREMENT
Get a quotation for WM2
Tell us the size and quantity you need. Add the fluid, flow or output requirement if known. You can review and send the enquiry from your email app on the next page.
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