Water meters WP-CI
Cast Iron Woltman Water Meter
A cast iron Woltman for buried bulk lines, DN50 to DN300.
- Nominal size
- DN50 DN65 DN80 DN100 DN125 DN150 DN200 DN250 DN300
- Q3 permanent flow
- 15 m³/h 25 m³/h 40 m³/h 60 m³/h 100 m³/h 150 m³/h 250 m³/h 400 m³/h 600 m³/h
- Accuracy class
- Class B (ISO 4064:1993) Class B (ISO 4064:1993) Class B (ISO 4064:1993) Class B (ISO 4064:1993) Class B (ISO 4064:1993) Class B (ISO 4064:1993) Class B (ISO 4064:1993) Class B (ISO 4064:1993) Class B (ISO 4064:1993)
- Maximum working pressure
- 16 bar 16 bar 16 bar 16 bar 16 bar 16 bar 16 bar 16 bar 16 bar
Select nominal size (DN)
Specifications update with the selected size.
Documents
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Overview
Why buyers choose it
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Sized for the trunk main
DN50 to DN300 with permanent flow to 600 m³/h, which is where a works intake or a district's incoming main sits.
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Removable measuring element
Re-verification takes the element, not the body, so the main stays where it was laid.
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Built for a chamber
The cast iron body takes the weight of a flanged connection and the knocks of a buried installation.
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Register reads from any angle
The dial rotates a full 360°, so the meter is set to suit the pipe rather than the hatch.
In detail
The cast iron Woltman covers the sizes above where a brass body stops being practical — DN50 through DN300, with permanent flow up to 600 m³/h. It is the meter for a trunk main or a works intake, where the meter sits in a chamber and is expected to stay there for a decade.
A cast iron body is chosen for the reason it has always been chosen on buried work: it takes the mechanical abuse of a chamber, the weight of the flanged connection and the occasional water hammer without deforming. The measuring element lifts out separately, so the periodic re-verification a utility owes its regulator does not mean cutting the body out of the main.
This meter is declared to the 1993 edition of ISO 4064, in accuracy class B rather than the class 1 and 2 of the current edition. That matters when a tender specifies the current standard: the two classifications are not interchangeable and the declared figures should be read as the edition states them.
Technical specifications
Selected size: DN50 DN65 DN80 DN100 DN125 DN150 DN200 DN250 DN300
Values shown apply to the selected size. A dash means the figure is not stated.
Metrological
| Nominal size | DN50 DN65 DN80 DN100 DN125 DN150 DN200 DN250 DN300 |
|---|---|
| Accuracy class | Class B (ISO 4064:1993) |
| Register type | Dry dial, magnetically driven |
| Maximum permissible error, Q1 to Q2 | ±5% |
| Maximum permissible error, Q2 to Q4 | ±2% |
| Indicating range | 9,999,999 9,999,999 9,999,999 9,999,999 99,999,999 99,999,999 99,999,999 99,999,999 99,999,999 |
| Resolution of indicating device | 0.002 0.002 0.002 0.002 0.02 0.02 0.02 0.02 0.02 |
Hydraulic
| Q3 permanent flow | 15 m³/h 25 m³/h 40 m³/h 60 m³/h 100 m³/h 150 m³/h 250 m³/h 400 m³/h 600 m³/h |
|---|---|
| Q1 minimum flow | 0.45 m³/h 0.75 m³/h 1.2 m³/h 1.8 m³/h 3 m³/h 4.5 m³/h 7.5 m³/h 12 m³/h 18 m³/h |
| Maximum working pressure | 16 bar |
| Q2 transitional flow | 3 m³/h 5 m³/h 8 m³/h 12 m³/h 20 m³/h 30 m³/h 50 m³/h 80 m³/h 120 m³/h |
| Q4 overload flow | 30 m³/h 50 m³/h 80 m³/h 120 m³/h 200 m³/h 300 m³/h 500 m³/h 800 m³/h 1200 m³/h |
Materials
| Body material | Cast iron |
|---|
Environmental
| Temperature class | ≤30 °C (hot-water version ≤90 °C) |
|---|
Approvals
| Standards | ISO 4064:1993 |
|---|
Dimensions and installation
Length
200 mm
200 mm
225 mm
250 mm
250 mm
300 mm
350 mm
450 mm
500 mm
Height
247 mm
260 mm
265 mm
272 mm
295 mm
302 mm
359 mm
470 mm
492 mm
| Connection thread | Flange |
|---|---|
| Length | 200 mm 200 mm 225 mm 250 mm 250 mm 300 mm 350 mm 450 mm 500 mm |
| Weight | 12 kg 13 kg 15 kg 19 kg 23 kg 30 kg 42 kg 94 kg 97 kg |
| Orientation limitation | Horizontal |
| Height | 247 mm 260 mm 265 mm 272 mm 295 mm 302 mm 359 mm 470 mm 492 mm |
| Flange outside diameter | 165 mm 185 mm 200 mm 220 mm 250 mm 285 mm 340 mm 395 mm 445 mm |
| Bolt circle diameter | 125 mm 145 mm 160 mm 180 mm 210 mm 240 mm 295 mm 350 mm 400 mm |
| Connecting bolts | 4 × M16 4 × M16 8 × M16 8 × M16 8 × M16 8 × M20 8 × M20 (1.0 MPa) 12 × M20 (1.0 MPa) 12 × M20 (1.0 MPa) |
Parts
Parts of a Woltmann meter
How a meter of this type is built, and what this model is made of.
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Register cover
Caps the register and keeps water and debris off the dial.
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Register
Totalises and displays the water passed.
Register type Dry dial, magnetically driven
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Register seal
Seals the register housing against water ingress.
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Chamber cover
Bolted cover giving access to the measuring element inside the body.
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Helical-vane rotor
Spins with the flow along its helical vanes and drives the register through a gear train.
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Body
Flanged cast body that houses the rotor and carries the flow.
Body material Cast iron
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Flange gaskets and bolts
Seal and secure the flanged joints to the pipeline.
Download centre
Everything you need to specify.
Documents for the Cast Iron Woltman Water Meter.
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Technical datasheet
Specifications and dimensions for DN50.
Specifications and dimensions for DN65.
Specifications and dimensions for DN80.
Specifications and dimensions for DN100.
Specifications and dimensions for DN125.
Specifications and dimensions for DN150.
Specifications and dimensions for DN200.
Specifications and dimensions for DN250.
Specifications and dimensions for DN300.
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Download PDF (Opens in a new tab)
All sizes datasheet
Every size in one sheet.
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- Sizes
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- Q3 permanent flow
- 1.5 m³/h at DN15
