 |
 |
| Flow Alarms and Flow 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: |
| |
|
|
