General Description
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The RCM is a differential pressure direct reading flowmeter. It
is suitable for monitoring all liquids and gases that have low or
medium viscosity, low solids content, and are compatible with the
materials of construction. The meter features rugged, compact construction.
In liquid applications of 6 GPM and higher, pulsation snubbers are
incorporated into the connecting pressure passages to produce smooth
meter operation independent of pipeline turbulence.
This meter was
developed for industrial flow metering applications in which durability
and reliability are important considerations. Accuracy, small size,
low cost, minimal maintenance and resistance to accidental damage
are the prime goals in the RCM design. Typical applications include:
lube oil and cooling water monitoring, blending processes, reverse
osmosis systems, and compressed air measurement.
The RCM is available
with a 4–20 mA output for interfacing with remote displays
and controllers. Limit switches are available to provide high and
low limit signals. A 0–1000 Hz frequency output is available
to drive frequency based controllers and counters. |
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Specifications
Accuracy:
± 3% Full Scale
Flow Media: Liquids and Gases
Mounting: Horizontal or Vertical
Temperature Range
(Ambient and Process)
- Standard: – 30 to 212 °F
- Optional: – 80 to 350 °F
Maximum Pressure
- Standard: 180 PSIG
- Optional: 400 PSIG
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Housing: Polycarbonate UV stabilized
Body: Bronze, Monel, or 316 SS
Option -ES: also TeflonTM
Bellows: Bronze, Monel 316 SS or InconelTM
Movement: Bronze or SS
Seals: Buna-N, Viton, EPDM or TeflonTM
Crystal: Polycarbonate
Relay Options: High/Low Alarms
Output Options: 4–20mA 0–1000
Hz Frequency |
Ordering Information
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Order RCM Series Flowmeter by:
- choose range and material for wetted part on order number tables
- choose options (if required)
- specify direction of flow according to Flow Direction instructions
below.
Flow Direction:
- R Horizontal, flow to right
- L Horizontal, flow to left
- VUR Vertical, flow up, dial at right
- VDR Vertical, flow down, dial at right
- VUL Vertical, flow up, dial at left
- VDL Vertical, flow down, dial at left
Example:
RCM-7117-A-D-R is the catalog no. for a 3/4" NPT RCM Series
7000 Flowmeters of bronze construction, flow direction from left
to right, flow rating of 20 GPM (full scale), equipped with optional
seals of Viton and optional gasketed case.
Options (if required).
1S2
2S2
A
B
C
D
E
ES
G
H
K
N
O2
P
R
T
V
W
W2
W3
X
Y
Z |
ingle SPDT Reed switch
Dual SPDT Reed switch
Viton seals
Customer-specified seals
Calibration for specific gravity
Gasketed case
Non-standard flow rate
Low flow rate
Custom scales and dials
400 psig service
Steam service (SS only)
Ammonia service
Oxygen cleaning
Panel mounting kit
LCD rate & total display
350 °F service rating
Calibration for high viscosity
4–20 mA dc
4–20 mA DP Transmitter
4–20 mA Blind DP Transmitter
Hi/Lo alarm relays
1000 Hz full scale frequency
Comb. of options W, X, Y |
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A minimum of 10 PSIG of back pressure is required for the RCM to
be suitable for use with your application.
Order Numbers are a combination of the part number in the above
table, and the Suffix designation for the desired options.
Example:
A 1/4" Monel unit for 0.4–3.0
GPM Water with Viton seals, flow right to left:
Order Number = RCM-7203
+ A + L = RCM-7203-A-L.
When ordering, specify: Name of medium, viscosity and specific gravity
if medium is other than water.
As with all RCM flowmeters, a minimum of 10 PSIG back
pressure is required for proper operation.
Order Numbers are a combination of the part number in the above
table, and the Suffix designation for the desired options.
Example:
A 1/2" Bronze unit for 4.0–30
SCFM Air at 400 PSIG and 350 °F, flow down at left:
Order Number
= RCM-9106 + H + T + VDL = RCM-9106-H-T-VDL
When ordering, specify: Type of gas, operating inlet pressure and
temperature.
Order Numbers are a combination of the part number in the above
table, and the Suffix designation for the desired options.
Example:
A 4" Bronze unit for 800 GPM Water
with Viton seals, flow up dial at right:
Order Number = RCM-5139
+ A + VUR = RCM-5139-A-VUR
When ordering, specify: Name of medium, viscosity and specific gravity
if medium is other than water.
RCM-5000 & 6000 series flowmeters are designed
for wafer style mounting between two adjoining flanges. As with
all model RCM meters, a minimum of 10 PSIG back pressure is required
for operation. The meter will fit between all standard 150 lb or
300 lb ANSI flanges, DIN PN 10 or PN 16 flanges, JIS and AS flanges.
Installation requires flanges, flat gaskets and flange bolts provided
by the user.
Order Numbers are a combination of the part number in the above
table, and the Suffix designation for the desired options.
Example:
A 6" Stainless Steel unit for 5000
SCFM Air with 4–20 mA transmitter and NEMA 4 gasketed case,
flow to the right is:
Order Number = RCM-6338 + D2 + W-R = RCM-6338-D2-W-R.
When ordering, specify: Type of gas, operating inlet pressure and
temperature.
Output Specifications
Output Combinations
Output options may be combined in any fashion desired. However,
choice on an electronic output option does limit the choice of other
options. In particular, choice of option W, W2, W3, X or Y, precludes
the selection of the following options:
- Option D: Gasketed Case
- Option K: Steam Service
- Option N: Ammonia Service
- Option T: High Temperature
- Option 1S2: Single SPDT Switch
- Option 2S2: Dual SPDT Switch
General to All Output Options
Electrical Rating: Gen. Purpose
Power Requirements: 24 VDC ± 10%
Accuracy of Gauge with Outputs
Horizontal flow: ± 3% F. S.
Vertical flow: ± 5% F. S.
Maximum Temperature
Ambient: – 30 to 120 °F
Medium: – 30 to 212 °F |
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Dimensions
Output Options
The RCM offers five powered output configurations to allow
connection to a variety of electronic process control equipment.
The position of the indicator arm is read by a Hall sensor
and translated into the required electrical signal:
- Option W: 4–20 mA Flow Rate Transmitter
- Option W2: 4–20 mA Differential Pressure Transmitter
- Option W3: 4–20 mA Differential Pressure Transmitter
w/o Indicator (Blind transmitter)
- Option X: High and Low Alarm Relay Output
- Option Y: 0–1000 Hz Frequency Output
- Option Z: Options W, X & Y combined
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Output Specifications
Analog Output: Option W
Output
Signal: 4–20 mA Proportional to Flow
Load: 800 Ohms max.
Zero: 15% of Full Scale
Span: 30% to 100% of Full Scale Flow
Power: 24 VDC ± 10% 50 mA max.
Analog Output: Option W2/W3
Output: 4–20 mA Proportional to Differential
Pressure
Load: 250 Ohms max.
Span: 15% to 100% of Full Scale Orifice Δ P
Power: 24 VDC ± 10%
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Alarm Relays: Option X
Two N/O limit relays are provided; one relay is configured
as a minimum and the other as a maximum. Red and green LEDs
indicate relay operation.
Output: 2 N/O Limit Relays
Power: 24 VDC ± 10% 50 mA max.
Contact Rating
AC: 3.0 A @ 24 VAC
1.0 A @ 117 VAC
0.5 A @ 230 VAC
DC: 2.0 A @ 30 VDC
0.6 A @ 110 VDC
0.5 A @ 140 VDC
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Frequency Output: Option Y
A 0–1000 Hz frequency output is available to drive pulse
triggered controllers. The usable range is 30% to 100% of
full scale flow.
Output: Frequency signal 0–1000 Hz
5 V peak
Zero: 15% of Full Scale
Span: 30% to 100% of Full Scale Flow
Power: 24 VDC ± 10% 50 mA max. |
Dimensions of Wafer Style Meters
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Wafer style RCM flowmeters
are designed for mounting between two adjoining flanges. The
meter will fit between all standard 150 lb or 300 lb ANSI
flanges, DIN PN 10 or PN 16 flanges, JIS and AS flanges.
Installation requires flanges, flat gaskets and flange bolts
provided by the user. |
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