Part Number 77C

Safety Relief Valve

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Part Number
DEMIL
Shelf Life
UOM
NIIN
Part:
77c
Demil:
No
Shelf Life:
UOM:
NIIN:
014995988

Part Information
Dresser rand purchases this valve (pc 82) and spring (pc 81, p/n 407s-ws) from fulflo and assembles and sets cracking pressure at their factory. Dresser rand refused to specify cracking pressure setting. Similar item is 4820-01-259-8850 which uses the same spring and is set at 55 psi.

NSN
National Stock Number:
4820-01-499-5988 4820014995988
TXT
Description:
Safety Relief Valve
INC
INC
Item Name Code:
05488
MRC:
The part that controls the flow through the item.ADQU
Flow Control Device:
Piston
MRC:
Indicates the type of housing on the item that accommodates the stem packing or spring.ADSR
Bonnet Type:
Inside spring
MRC:
The means by which the bonnet is attached to the item.ADST
Bonnet Attachment Method:
Threaded
MRC:
The means of closing the item when inlet pressure decreases.ADSU
Disk Loading Method:
Spring
MRC:
The national stock number or the identification information of the end equipment for which the item is a part.AGAV
End Application:
Centrifugal compressor
MRC:
The style designation indicating the configuration that most nearly corresponds to the appearance of the connection.AHNC
Connection Style:
G5a flar (tube) all ends
MRC:
The means used to control the operation of the valve.AQLR
Valve Operation Method:
Automatic
MRC:
Indicates the type of connection/s/.AWLS
Connection Type:
Threaded internal pipe all ends
MRC:
The minimum to maximum pressures at which the item may be set to open.CQCY
Adjustable Pressure Range:
+30.0/+100.0 pounds per square inch
MRC:
The maximum pressure at which the item is rated for operation.CQGM
Maximum Operating Pressure:
100.0 pounds per square inch single response
MRC:
The chemical compound or mechanical mixture properties of which the item is fabricated.MATT
Material:
Steel
MRC:
The type of media for which the item is designed.MEDA
Media For Which Designed:
Liquid 2nd response
MRC:
The type of media for which the item is designed.MEDA
Media For Which Designed:
Oil 1st response
MRC:
The style designation indicating the configuration that most nearly corresponds to the appearance of the item.STYL
Style Designator:
Err-090

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