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Coupling Material & Configuration Selection
Technical Information for Quick Couplings
The chart below will help you identify the OMEGA®
coupling options available to meet your application requirements. To select a coupling, identify the options required in your coupling application. Each of the options is explained below followed by an example.
 
Coupling Materials  
OMEGA® couplings are made from several different
materials. Consider the fluid being transferred and the environment in which the coupling will operate. See page F-47 for further information.
 
-- AIR WATER ACIDS BASES SOLVENTS
Acetal Best Best Good Good Best
Polypropylene Best Best Best Best Good
Chromed Brass Best Best Good Good Fair
Polysulfone Best Best Good Good No

Flow Sizes  
OMEGA's standard product lines have three different flow sizes: 1/8," 1/4," and 3/8." Liquid flow is measured in gallons per minute (gpm) and cubic feet per minute (cfm) for air. To select the correct size determine how many gpm or cfm are required for your application. See pages F-47 and F-48 for further information.
 
Mounting Options 
Mounting options determine the way in which the coupling is configured in the application. OMEGA®
couplings are available in panel mount, pipe thread
or in line configurations.
 
Shutoff Options  
Shutoff valves in the coupling prevent spillage when
it is disconnected. Couplings are available with four different shutoff options:
 

Straight Thru:
No Shutoff valves

Single End Shutoff:
Shutoff valve in body half or
Shutoff valve in insert half


Double End Shutoff:
Shutoff valves in both halves
COUPLING SELECTION EXAMPLE:
Material Selection: Fluid is strong acid
Flow Size:
1/4"
Mounting Option:
In Line
Shutoff Option:
Double End Shutoff
Connection Option: Hose barb ends
Coupling Option: FT-PLC-12


Material
Selection
Coupling Series & Size Mounting Options Shutoff Options
Polypropylene FT-PMC-12 1/8" Panel
Mount
Pipe
Thread
In Line -- SingleEnd
Shutoff
Double End
Shutoff
FT-PLC-12 1/4" Panel
Mount
Pipe
Thread
In Line -- Single End
Shutoff
Double End
Shutoff
FT-HFC-12 3/8" Panel
Mount
Pipe
Thread
In Line Straight
Thru
Single End
Shutoff
Double End
Shutoff
Delrin Acetal FT-PMC 1/8" Panel
Mount
Pipe
Thread
In Line Straight
Thru
Single End
Shutoff
Double End
Shutoff
FT-PLC 1/4" Panel
Mount
Pipe
Thread
In Line Straight
Thru
Single End
Shutoff
Double End
Shutoff
Polysulfone FT-HFC-35 3/8" Panel
Mount
Pipe
Thread
In Line Straight
Thru
Single End
Shutoff
Double End
Shutoff
FT-HFC-35 3/8" Panel
Mount
Pipe
Thread
In Line Straight
Thru
Single End
Shutoff
Double End
Shutoff
Chrome-Plated FT-MC 1/8" Panel
Mount
Pipe
Thread
In Line Straight
Thru
Single End
Shutoff
Double End
Shutoff
BrassFT-LC 1/4" Panel
Mount
Pipe
Thread
In Line Straight
Thru
Single End
Shutoff
Double End
Shutoff

Material Specifications for Standard OMEGA® Couplings
Refer to individual product listings for  material differences for each product line.
-- FT-PMC, FT-PLC,
FT-SMC, Tentube,Shutoff Valves1/8" & 1/4" Flow

FT-HFC-12, FT-PMC-12
FT-PLC-12, FT-SMC-12 1/8,1/4, & 3/8" Flow

FT-MCChrome-Plated Brass
1/8" & 1/4" Flow
FT-FFC-35 & FT-HFC-35 Polysulfone
.375" flow, .5" flow
Connector Housing Delrin Acetal Polypropylene Brass-Nickel/Chrome Plated Polysulfone
Latch 301 Stainless Steel 301 Stainless Steel or Polypropylene 301 Stainless Steel Polysulfone
Locking Pin 303 Stainless Steel 303 Stainless Steel 303 Stainless Steel --
Shutoff Valve Delrin Acetal Polypropylene Delrin Acetal Polysulfone
(HFC-35)
External Springs 302 Stainless Steel 302/316 Stainless Steel 302 Stainless Steel 316 Stainless Steel
(HFC-35)
Internal Springs 316 Stainless Steel 316 Stainless Steel 316 Stainless Steel 316 Stainless Steel
(HFC-35)
Panel Nut Brass-Nickel Plated Brass-Nickel Plated
or Polypropylene
Brass-Nickel Plated Polysulfone
(HFC-35)
PTF Nut
Brass-Nickel Plated
Brass-Nickel Plated Brass-Chrome Plated --
O-Ring
70 Durometer Buna-N
70 Durometer EPR 70 Durometer
Buna-N
70 Durometer Buna-N, EPR, or Medical Grade Silicone
O-Ring Lube
Silicone Food Grade Silicone Food Grade Silicone Food Grade Food Grade

Regulatory approvals for OMEGA products

FDA & USDA
 
The U.S. Food and Drug Administration publishes, through the Code of Federal Regulations, standardized criteria which govern the acceptability of materials used in food contact. The U.S. Department of Agriculture publishes similar standards
that mirror F.D.A. criteria. Neither agency approves or disapproves products for particular applications.
 
Most CPC products can be specified in a way that complies with applicable F.D.A.
or U.S.D.A. standards. In all cases, the standard O-Ring seals are replaced with special materials.
 
ISO 9001 Certification  
ISO 9001 certification is a process which verifies the consistency with which organizations deliver the products their customers have ordered. Companies having ISO 9001 certification have satisfied independent registration authorities that they can deliver what the customer expects every time the customer orders the product.
OMEGA Engineering has been approved and certified under the ISO 9001 standard.
Contact OMEGA Quality Management for more information.
NSF
NSF International, based in Ann Arbor, Michigan, develops and publishes consensual criteria that govern the
acceptability of materials and equipment used in food and beverage processing.

They also do testing to verify the performance of materials or devices to their published criteria.
 
OMEGA has listed, and continues to list,
many of its product lines under the criteria of NSF Standard C-2, which governs components used in food and beverage contact applications.
Contact OMEGA Customer Service for specific details regarding your application.
 

Cv Values for High Flow Couplings
Bodies HFC
226-12
HFCD
226-12
HFC
228-12
HFCD
228-12
HFC
236-12
HFCD
236-12
HFC
238-12
HFCD
238-12
HFC
246-12
HFCD
246-
12
HFC
248-12
HFCD
248-12
HFC
2212-12
HFCD
2212-
12
FT-HFC
106-12
1.27 1.27 1.62 1.51 1.14 1.14 1.46 1.36 1.80 1.58 1.70 1.65 -- --
FT-HFC
108-12
1.28 1.34 1.62 1.51 1.15 1.24 1.46 1.36 1.81 1.54 1.72 1.56 -- --
FT-HFC
166-12
1.07 1.00 1.17 1.14 0.96 0.90 1.05 1.03 1.33 1.26 1.30 1.24 -- --
FT-HFC
168-12
1.25 1.23 1.61 1.52 1.13 1.11 1.45 1.37 1.79 1.60 1.68 1.56 -- --
FT-HFC
176-12
1.07 1.00 1.17 1.14 0.96 0.90 1.05 1.03 1.33 1.26 1.30 1.24 -- --
FT-HFC
178-12
1.25 1.23 1.61 1.52 1.13 1.11 1.45 1.37 1.79 1.60 1.68 1.56 -- --
FT-HFC 1712-12 -- -- -- -- -- -- -- -- -- -- -- -- 3.94 --
FT-HFC 1712-12 -- -- -- -- -- -- -- -- -- -- -- -- -- 2.04

Flow Rate Information for Couplings
 
The graphs show the flow rate for OMEGA® 1/8" FT-MC/PMC and 1/4" FT-LC/PLC flow couplings. The tests were conducted with pipe thread bodies and hose barb inserts. Each coupling was tested in straight thru, single end shutoff and double end shutoff models with water at 70°F.
 
To determine flow rates for specific coupling configurations use the formula below.

Q = Flow Rate in gallons per minute.
Cv = Average Constant of Various Rates.
See charts below.
^P = Pressure Drop Across Coupling.
S = Specific Gravity of Liquid.


Example:

Coupling Body = MC 10-04
Coupling Insert = MC 20-04
Cv = .4 (see chart)
^P = 40
S = 1 (water)




C
v Values for Subminiature Couplings
BODIES SMM-01 SMM-02 -- SMM-01 SMM-02
SMF-01 .03 .03 SMFD-02 .028 .08
SMFD-01 .025 .025 SMPT-02 .03 .19
SMF-02 .03 .19 SMPTD-02 .028 .08

C
v Values for 1/8" Flow Couplings
(Part 1)
Body MC
20-04
MCD
20-04
MC
20-06
MCD
20-06
MC
22-02
MCD
22-02
MC
22-04
MCD
22-04
MC
24-02
MCD
24-02
FT-MC 10-02 .40 .18 .50 .19 .25 .16 .50 .19 .50 .20
FT-MCD 10-02 .27 .18 .31 .18 .24 .16 .28 .20 .26 .20
FT-MC 10-04 .40 .21 .50 .24 .26 .18 .50 .24 .50 .20
FT-MCD 10-04 .29 .19 .32 .23 .25 .17 .30 .23 .27 .21
FT-MC 12-04 .40 .18 .50 .18 .25 .16 .40 .18 .40 .16
FT-MCD12-04 .21 .17 .22 .17 .20 .16 .22 .17 .21 .17
FT-MC 16-02 .23 .15 .28 .18 .19 .14 .27 .15 .27 .15
FT-MCD 16-02 .19 .15 .19 .15 .17 .14 .19 .15 .18 .15
FT-MC16-04 .33 .23 .44 .24 .24 .18 .44 .23 .44 .20
FT-MCD 16-04 .23 .17 .26 .21 .22 .16 .26 .21 .26 .19
FT-MC 17-03 .25 .20 .30 .20 .20 .17 .30 .20 .30 .19
FT-MCD 17-03 .20 .17 .20 .17 .19 .15 .21 .17 .19 .17
FT-PMC 17-01 .03 .03 .03 .03 .03 .03 .03 .03 .03 .03
FT-PMCD 17-01 .027 .027 .027 .027 .027 .027 .027 .027 .027 .027

Cv Values for 1/8" Flow Couplings (Part 2)
Body MC
24-04
MCD
24-04
MC
26-02
MC
23-04
MC
21-04
MCD
23-04
MC
22-03
MCD
22-03
PMC
22-01
PMC
D
22-01
FT-MC 10-02 .51 .19 .50 .50 .38 .24 .30 .17 .03 .027
FT-MCD 10-02 .29 .18 .26 .26 .27 .24 .25 .17 .03 .027
FT-MC 10-04 .51 .24 .50 .50 .38 .26 .30 .19 .03 .027
FT-MCD 10-04 .28 .23 .27 .28 .29 .24 .25 .18 .03 .027
FT-MC 12-04 .36 .18 .40 .40 .38 .21 .30 .17 .03 .027
FT-MCD12-04 .20 .17 .21 .22 .21 .18 .21 .16 .03 .027
FT-MC 16-02 .28 .18 .27 .27 .23 .16 .20 .14 .03 .027
FT-MCD 16-02 .18 .15 .18 .19 .19 .15 .18 .14 .03 .027
FT-MC16-04 .38 .24 .38 .44 .33 .26 .26 .19 .03 .027
FT-MCD 16-04 .25 .21 .21 .26 .23 .24 .22 .16 .03 .027
FT-MC 17-03 .28 .20 .28 .30 .25 .18 .21 .17 .03 .027
FT-MCD 17-03 .20 .17 .19 .20 .20 .16 .19 .16 .03 .027
FT-PMC 17-01 .03 .03 .03 .03 .03 .03 .03 .03 .025 .023
FT-PMCD 17-01 .027 .027 .027 .027 .027 .027 .027 .027 .023 .023

C
v Values for 1/4" Flow Couplings
Bodies LC
200-04
LCD
200-04
LC
200-06
LCD
200-06
LC
220-04
LCD
220-04
LC
220-06
LCD
220-06
LC
240-04
LCD
240-04
LC
240-06
LCD
240-06
LC
260-04
FT-LC
100-04
.40 .36 1.05 .58 .83 .56 1.40 .82 1.40 .75 1.40 .77 .83
FT-LCD
100-04
.36 .31 .73 .48 .66 .41 .82 .50 .80 .45 .77 .45 .81
FT-LC
100-06
.40 .36 1.05 .60 .83 .56 1.40 .81 1.40 .76 1.40 .76 .83
FT-LCD
100-06
.37 .31 .81 .47 .70 .43 1.02 .51 .98 .46 .99 .48 .98
FT-LC
120-06
.38 .36 .84 .63 .74 .56 1.14 .75 1.14 .70 1.14 .72 .74
FT-LCD
120-06
.38 .33 .78 .49 .68 .44 .84 .49 .81 .43 .82 .44 .81
FT-LC
160-04
.38 .37 .87 .54 .95 .51 1.00 .70 .95 .64 1.00 .66 .95
FT-LCD
160-04
.37 .31 .61 .44 .57 .41 .78 .44 .78 .43 .75 .46 .78
FT-LC
160-06
.38 .37 1.00 .57 .95 .53 1.40 .80 1.40 .71 1.40 .73 1.40
FT-LCD
160-06
.38 .32 .71 .49 .63 .42 .89 .51 .96 .45 .92 .49 .97



Material
ABS Acetal LDPE Chrome-Plated
Brass
Nylon Polycarb-
onate
Polypro-pylene Polysul-fone Buna-N EPR FKM
Chemical
Acids, Weak B F B B B B B B G B G
Acids, Strong N N B F N N B G F B G
Alcohols F G B B N G B G F B G
Aldehydes F G G F F F F N N G F
Aliphatic Hydrocarbons F B F B B F G G G N B
Aromatic Hydrocarbons N B F B B N F F F N B
Bases, Weak F F B G F F B B G B G
Bases, Strong N N B F F N B G N B N
Esters N G F B B N G N N B F
Halogenated Hydrocarbons N G N B G N F N N N B
Ketones N G G B B N G N N G N
Oxidizing Agents, Strong N N F F N N F G N F G
This reference chart is compiled from material manufacturersí guidelines and commonly used technical references such as the Compass Corrosion Guide. Chemicals can affect the strength, surface appearance, color, dimensions or weight of plastics. Therefore, OMEGA presents this chemical resistance chart as a basic guide to applications only. Because many factors affect the chemical resistance of a given material, it is the customerís responsibility to test OMEGA products under their own application conditions.

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