WMAC axial helix Woltmann meter for hard water or water containing small suspended solids. Blind meter with built-in pulse output.
WMAC is a Woltmann meter designed for cold water (a version for hot water is also available). Mechanical drive design, insensitive to external magnetic fields. Hydraulic performance in compliance with EEC standards. The meters undergo strict and highly selective tests. Suitable for horizontal, vertical or inclined installation positions. Suitable for use with scaling water or containing small debris. Minimum head loss even at relatively high flow rates.
• DN 40 (brass) and 50 (cast iron)
• Operating temperature: 30 °C (up to 90 °C upon request)
• Horizontal, vertical or angled installation
• Pulse ratio: 1P=1L
• Integrated flow straightener
• Pulse rate: one pulse per litre (K=1)
• Brass body (DN 40) or epoxy coated cast iron body (DN 50; threaded or flanged (DN 50 mm) design
• Non-hygroscopic, antimagnetic and wear resistant plastic helix
• Built-in inlet flow straightener
| HYDRAULIC PERFORMANCE | ||
|---|---|---|
| Size | 40 mm 1½” |
50 mm 2″ |
| Qmax (m³/h) | 20 | 30 |
| Qn (m³/h) | 10 | 15 |
| Qt (m³/h) | 2.5 | 3 |
| Qmin (m³/h) | 0.9 | 1.2 |
| Nominal pressure (bar) | 10/16 | |
| DIMENSIONS | ||
|---|---|---|
| L (mm) | 170 | 170 |
| D (threaded design) (in) | 2 | 2½ |
| D (flanged design) (mm) | – | 165 |
| h (threaded design) (mm) | 91.5 | 116.2 |
| h (flanged design) (mm) | – | 116.2 |
| REED SWITCH TECHNICAL FEATURES | |
|---|---|
| Switching voltage | 30 V cc/ca |
| Contact resistance | 100 MΩ |
| Insulation resistance | 1011 Ω |
| Operating temperature | -90 °C ÷ +40 °C |
| Service life | 109 operations |
