|
|
| Flow
Alarms and Switches |
|
 |
| • |
Unrestricted
Mounting: Allows
the designer to install the monitor in any orientation
-- horizontal, vertical or inverted. |
| • |
Field
Adjustable Alarm Setting: Only
a screwdriver is required to change the flow rate alarm
setting. |
| • |
Economical
Protection: This
monitor can rapidly pay for itself as it "sounds
the alarm" on incorrect lubrication or cooling
volumes, protecting expensive equipment and reducing
downtime. |
|
| • |
Sealed
Polycarbonate Housing: Allows
operation in areas where incidental or non-incidental
wash-downs can occur. |
| • |
Quality
Assurance: Can
be an integral part of a quality control system, yielding
consistent system operation. |
| • |
Simple
ON/OFF Logic: Positive
alarm points using 10 A, dry-contact, SPDT switches,
reduces the complexity found in standard rotameter OFF/ON/OFF
circuits. |
| • |
Pre-wired
with Cable Disconnect: The
standard Hirschmann inter- connection provides easy
installation and service of the FLOW ALARM and the system
it is a part of. |
|
| ENGINEERING
SPECIFICATIONS:
The in-line flow rate monitor/alarm
shall:
| • |
have field
adjustable, dry contact, alarm setting(s). |
| • |
use the
variable annular orifice technique with compression
spring recovery. |
| • |
not require
inlet or outlet straight plumbing or require vertical
pipe mounting. |
| • |
have a
measuring accuracy of ±2.5% of full scale in
the center third of the measuring range and ±4%
of full scale accuracy over the entire flow measuring
range. |
| • |
have a
stainless steel sharp-edged orifice. |
| • |
have a
weather-tight external construction |
| • |
be a Lake
monitors No. M _ _ - _ _ _ - _ _ for single alarm applications
or N _ _ - _ _ _ - _ _ for dual alarm applications. |
|
| MATERIALS
OF CONSTRUCTION:
Wetted
Components
| Component |
Aluminum
|
Brass
|
Stainless
Steel
|
|
High-pressure
casing, end ports and tapered shaft
|
Aluminum
|
Brass
|
Stainless
Steel
|
|
Seals
|
Buna-N
(STD), EPR and Viton® or Kalrez®
|
Buna-N
(STD), EPR and Viton® or Kalrez®
|
Viton®
with Teflon® backup, Buna-N, EPR or Kalrez®
|
|
Transfer
Magnet
|
Teflon®
coated Alnico
|
Teflon®
coated Alnico
|
Teflon®
coated Alnico
|
|
Floating
Orifice Disk
|
Stainless
Steel
|
Stainless
Steel
|
Stainless
Steel
|
|
All other
internal parts
|
Stainless
Steel
|
Stainless
Steel
|
Stainless
Steel
|
|
| MATERIALS
OF CONSTRUCTION:
Non-Wetted
Components
| Component |
Aluminum
|
Brass
|
Stainless
Steel
|
|
Enclosure
|
Series 3: polycarbonate
Series 4: polyester
Series 5: polycarbonate and aluminum
|
Series 3: polycarbonate
Series 4: polyester
Series 5: polycarbonate and aluminum
|
Series 3: polycarbonate
Series 4: polyester
Series 5: polycarbonate and aluminum
|
|
Window Seals
|
Buna - N
|
Buna - N
|
Buna - N
|
Teflon, Viton and Kalrez
are registered trademarks of duPont de Nemours & Co.
|
PERFORMANCE:
| • |
Measuring
Accuracy: ±2.5%
of full-scale in the center third of the measuring range;
±4% of full-scale over the entire scale range. |
| • |
Repeatability:
±1%
of full-scale |
| • |
Flow
Measuring Range: 0.05-150
GPM (0.2-560 LPM) |
| • |
Maximum
Operating Pressure: Aluminum
and Brass Monitors: 3500 PSIG (240 Bar) Stainless Steel
Monitors: 6000 PSIG (410 Bar) |
| • |
Maximum
Operating Temperature: Fluid:
240ºF (116ºC) Ambient: 180ºF (82ºC)
|
| • |
Pressure
Differential: See
Graphs. Gases: See PNEUMATIC |
| • |
Standard
Calibration Fluids: Oil
Monitors: DTE 25 @ 110ºF (43ºC), 0.873 sg |
| • |
Water
Monitors: Tap
water @ 70ºF (21ºC), 1.0 sg |
| • |
Air
Monitors: Air
@ 70ºF (21ºC), 1.0 sg and 100 PSIG |
| • |
Alarm
Switch Dead-Band: 4%
of full scale |
| • |
Alarm
Switch Contacts: SPDT
(dry contact), UL/CSA rating: 10 amps and 1/4 hp, 125
or 250 Vac. 1/2 amp, 125 Vdc; 1/4 amp, 250 Vdc; 3 amps,
125 vac "L" (lamp load). |
|
| MECHANICAL: |
|
|
|
|
DIM
|
Series
3
|
Series
4
|
Series
5
|
Series
5
|
|
A
|
6-9/16"
(167mm)
|
7-5/32"
(182mm)
|
3-1/2"
(90mm)
|
3-1/2"
(90mm)
|
|
B
|
3-11/32"
(85mm)
|
3-9/16"
(90mm)
|
10-1/8"
(258mm)
|
12-5/8"
(322mm)
|
|
C
|
3-5/32"
(80mm)
|
3-9/16"
(90mm)
|
–
|
–
|
|
D
|
1-7/8"
(47mm)
|
1-7/8"
(47mm)
|
–
|
–
|
|
Port Sizes
|
NPTF: 1/4", 3/8",
1/2"
SAE: #6, #8, #10
BSP: 3/8", 1/2"
|
NPTF: 3/4", 1"
SAE: #12, #16
BSP: 3/4", 1"
|
NPTF: 1-1/4",
1-1/2"
SAE: #20, #24
BSP: 1-1/4", 1-1/2"
|
NPTF: 2"
SAE: #32
BSP: 2"
|
|
|
PRESSURE DIFFERENTIAL
VS FLOW RATE:
|
|
|
|
|
