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Relief Fittings
Used on gearbox housings and bearings.
The fittings open at pre-determined pressures as shown.
These fittings can be used with either grease or oil.
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Part # |
Description |
Style |
Pressure
|
Height
|
Shank
|
Hex
|
Alemite #
|
Lincoln #
|
|
MB317400 |
1/8" Npt w/Plunger |
Top Vent |
1/4-1 psi
|
1/2"
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19/64"
|
7/16"
|
317400
|
|
|
MB47200 |
1/8" Npt w/Plunger |
Top Vent |
1-5 psi
|
1/2"
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19/64"
|
7/16"
|
47200
|
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MB47640 |
1/8" Npt w/Plunger |
Top Vent |
7-1/2-15 psi
|
1/2"
|
19/64"
|
7/16"
|
47640
|
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MB323060 |
1/8" Npt w/Plunger |
Top Vent |
15-25 psi
|
1/2"
|
19/64"
|
7/16"
|
323060
|
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MB47100 |
1/8" Npt w/Plunger |
Top Vent |
45-80 psi
|
1/2"
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19/64"
|
7/16"
|
47100
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MB50500 |
1/8" Npt w/Plunger |
Top Vent |
400-650 psi
|
1/2"
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19/64"
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7/16"
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50500
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MB321839 |
3/8" Drive w/Plunger |
Top Vent |
1-5 psi
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1/2"
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19/64"
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7/16"
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321839
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MB338382 |
1/8" Npt Leak proof |
|
80-140 psi
|
9/16"
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11/32"
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7/16"
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338382
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MB5677 |
1/8" Npt W/Ball |
Side Vent |
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7/16"
|
9/32"
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7/16"
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5677
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MB5678 |
1/8" Npt W/Ball |
Side Vent |
7-1/2-15 psi
|
7/16"
|
9/32"
|
7/16"
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5678
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MB5679 |
1/8" Npt W/Ball |
Side Vent |
15-25 psi
|
7/16"
|
9/32"
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7/16"
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5679
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MB5680 |
1/8" Npt W/Ball |
Side Vent |
45-80 psi
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7/16"
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9/32"
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7/16"
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5680
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MB317400-4 |
1/4" Npt |
Top Vent |
1/4-1 psi
|
31/32"
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31/64"
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9/16"
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MB47200-4 |
1/4" Npt |
Top Vent |
1-5 psi
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31/32"
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31/64"
|
9/16"
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MB47640-4 |
1/4" Npt |
Top Vent |
7-1/2-15 psi
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31/32"
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31/64"
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9/16"
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MB323060-4 |
1/4" Npt |
Top Vent |
15-25 psi
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31/32"
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31/64"
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9/16"
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MB47100-4 |
1/4" Npt |
Top Vent |
45-80 psi
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31/32"
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31/64"
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9/16"
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MB50500 |
1/4" Npt |
Top Vent |
400-650 psi
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31/32"
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31/64"
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9/16"
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MB317400-6 |
3/8" Npt |
Top Vent |
1/4-1 psi
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1"
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15/32"
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11/16"
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MB47200-6 |
3/8" Npt |
Top Vent |
1-5 psi
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1"
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15/32"
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11/16"
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MB47640 |
3/8" Npt |
Top Vent |
7-1/2-15 psi
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1"
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15/32"
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11/16"
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MB323060-6 |
3/8" Npt |
Top Vent |
15-25 psi
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1"
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15/32"
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11/16"
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MB47100-6 |
3/8" Npt |
Top Vent |
45-80 psi
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1"
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15/32"
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11/16"
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MB50500-6 |
3/8" Npt |
Top Vent |
400-650 psi
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1"
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15/32"
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11/16"
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MB317400-8 |
1/2" Npt |
Top Vent |
1/4-1 psi
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19/64"
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9/16"
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13/16"
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MB47200-8 |
1/2" Npt |
Top Vent |
1-5 psi
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19/64"
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9/16"
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13/16"
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MB47640-8 |
1/2" Npt |
Top Vent |
7-1/2-15 psi
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19/64"
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9/16"
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13/16"
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MB323060-8 |
1/2" Npt |
Top Vent |
15-25 psi
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19/64"
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9/16"
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13/16"
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MB47100-8 |
1/2" Npt |
Top Vent |
45-80 psi
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19/64"
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9/16"
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13/16"
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