Page 342 - MidlandMetalsCatalog2010baNN

341
H
YDRAULIC
Steel Flange Adapters
Caution: Althoughmany Four-bolt Flanged Fittings
have sufficient structural integrity to support the
weight of many components, we recommend con-
sulting with our technical support department for
guidance in selection of parts for this purpose.
Working Pressures
The following table lists the recommended working
pressures for steel Four-bolt Solid and Split Flange
Fititngs and Hose Ends manufactured in accordance
with SAE standards J518 and J517. SAE recommends
sufficient testing to be conducted to assure that perfor-
mance levels will be safe and satisfactory, especially if
installed in systems operating at elevated pressures or
in severe conditions. When using Flanged Fittings that
have a threaded connection on one end, use the lower
pressure rating of the two.
Materials
• Steel per SAE J518 with either black phosphate finish or
plated chrome finish or iridite dip. Stainless Steel avail-
able upon request.
Conformance
• SAE J518
Dash Flange Head 4 TO 1 Minimum
Size OD Inches Burst PSI
-8 1-3/16 - 1.188 5000
-12 1-1/2 - 1.500 5000
-16 1-3/4 - 1.750 5000
-20 2 - 2.000 4000
-24 2-3/8 - 2.375 3000
-32 2-13/16 - 2.812 3000
-40 3-5/16 - 3.312 2500
-48 4 - 4.000 2000
-56 4-1/2 - 4.500 500
-64 5 - 5.000 500
-80 6 - 6.000 500
SAE J518 Four-bolt code 61
flange pressure ratings
Steel flange adapters
Assembly Instructions
recommended split four-bolt
Step1. Follow steps 1 through 3 above, then proceed to the following
steps.
Step 2.Position both flanges on port and turn one screw in each flange
about three turns.
Step 3. Rotate each flange away from the port for sufficient clearance to
position hose or fitting flange head on port.
Step 4. Close each flange until it properly captures flange head. Insert
remaining screws and finger tighten.
Step 5. Torque the screws in a figure eight sequence incrementally until
the appropriate torque value in the preceeding table is achieved.
Recommended Solid four-bolt
Step 1.Inspect port area to be smooth and free of nicks, burrs,
scratches, or contaminants.
Step2. Lubricate the o-ring and place in flange head groove.
Step 3. Lubricate screw threads, slip lock washers onto screws,
and insert screws into flange
Step 4. Position flange on port and finger tighten all screws.
Step 5. Torque the screws in a figure eight sequence, incremen-
tally until the appropriate torque value in the following table
is achieved.
Why wet Torque?
Due to the difference in plating types and thickness,
materials, and thread quality of different components,
the coefficient of friction varies greatly on any given
assembly. Lubrication not only produces a more con-
sistent coefficient of friction, it increases clamping
force on sealing area with less torque on the threads.
Overtightening causes threads toyield, deformand lose
their ability to maintain an adequate load or clamping
forceon the seatingarea. Extendedoperationand severe
conditions cause further yieldingwhich results in leaks.
Overtightening is the single greatest cause for leaks
in metal to metal seat hydraulic connections. It is our
firm position, that to not wet torque, is to compromise
consistency and quality for convenience.
Dash Flange Head 4 TO 1 Minimum
Size OD Inches Burst PSI
-8 1-1/4 - 1.250 6000
-12 1-5/8 - 1.625 6000
-16 1-7/8 - 1.875 6000
-20 2-1/8 - 2.125 6000
-24 2-1/2 - 2.500 6000
-32 3-1/8 - 3.125 6000
SAE J518 Four-bolt code 62
flange pressure ratings
Dash Port Code 61 Code 62
Size Size Foot/Lbs. Foot/Lbs.
-8 1/2” 15-19 15-19
-12 3/4” 20-29 25-33
-16 1” 27-35 41-50
-20 1-1/4” 35-46 62-75
-24 1-1/2” 46-58 116-133
-32 2” 53-67 200-217
-40 2-1/2” 79 NA
-48 3” 137 NA
-56 3-1/2” 116 NA
-64 4” 116 NA
-80 5” 116 NA
J518 Code 61 and code 62
flange minimum torque values
STEEL FLANGE ADAPTERS HYDRAULIC ADAPTERS