Dwyer WM2 - Manual

Series WM2 Multi-Jet Water Meters
Specifications - Installation and Operating Instructions
Bulletin F-WM2
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000 www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: [email protected]
SPECIFICATIONS
Service: Water.
Wetted Materials:
Body: Brass, polyethylene;
Couplings: Brass;
Measuring Chamber: Polyethylene, ABS plastic, ferrite, acetal.
Flow Range: See model chart.
Accuracy: Transitional Flow: ±5%; Nominal Flow: ±2%.
Temperature Limit: 104°F (40°C).
Pressure Limit: 232 psi (16 bar).
Pressure Drop: See pressure drop chart.
Totalizing Display Maximum: See model chart.
Mounting Orientation: Horizontal.
Weight: See dimension chart.
The Series WM2 Multi-Jet Water Meter is ideal for commercial and industrial
applications. The multi-jet design allows simplicity and accuracy with wide flow
ranges, even in low flow applications. The magnetically driven, hermetically sealed
register will not leak or fog and is completely separated from the water. These
water meters are designed for long service life and maintenance-free operation,
complete with an internal strainer.
Installation Instructions
1. Thoroughly flush the service line upstream of the meter to remove dirt and
debris.
2. Remove meter spud thread protectors.
Note: To protect meter spud threads, store the meter with thread protectors in
place.
3. Set the meter in the line. Install in a horizontal plane, with the register upright, in
a location accessible for reading, service and inspection. Arrows on the side of the
meter and above the outlet spud indicate the direction of flow.
4. For accurate measurement, the tap height should be higher than the meter.
5. Do not over-tighten connections; tighten only as required to seal. Do not use
pipe sealant tape on meter threads.
6. With upstream shut-off valve only: Open shut-off valve slowly, to remove air from
meter and service line. Open a faucet slowly to allow entrapped air to escape.
Close the faucet.
With both upstream and downstream shut-off valves installed. To test the
installation for leaks: Close the outlet (downstream) shut-off valve. Open the inlet
(upstream) shut-off slowly until meter is full of water. Open the outlet (downstream)
valve slowly until air is out of the meter and service line. Open a faucet slowly to
allow entrapped air to escape. Close the faucet.
H
L
W M 2 -X -C -X X
X X -X X
W
Size
in (mm)
5/8 (15)
5/8 x 3/4
3/4 (20)
1 (25)
1-1/4 (32)
1-1/2 (40)
2 (50) Spud NPSM
(BSPP)
3/4˝ (3/4˝)
1˝ (1˝)
1˝ (1˝)
1-1/4˝ (1-1/4˝)
1-1/2˝ (1-1/2˝)
2˝ (2˝)
2-1/2˝ (2-1/2˝) Length ‘L’
in (mm)
6-1/2 (165)
7-1/2 (190)
7-1/2 (190)
10-1/4 (260)
10-1/4 (260)
11-13/16 (300)
11-13/16 (300) Width ‘W’
in (mm)
3-45/64 (94)
3-45/64 (94)
3-45/64 (94)
3-55/64 (98)
3-55/64 (98)
4-51/64 (122)
5-45/64 (145) Height ‘H’
in (mm)
4-15/64 (107.5)
4-15/64 (107.5)
4-15/64 (107.5)
4-5/8 (117.5)
4-5/8 (117.5)
5-9/16 (141.5)
6-31/32 (177) Weight
lb (kg)
3.75 (1.7)
3.97 (1.8)
4.9 (2.2)
6.4 (2.9)
8.2 (3.7)
13.52 (6.17)
18.74 (8.5)