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NSN 4820-01-134-8845Government record, cited
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Seat, Valve4820-01-134-8845

NSN 4820-01-134-8845 · NIIN 011348845 · Part number HL18122PC81
Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 8FGX3
Government record, cited
NSN 4820-01-134-8845 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-134-8845. Manufacturer of record part number: HL18122PC81.
Also searched as  4820-01-134-8845 · 4820011348845 · NIIN 011348845 · 01-134-8845 · FSC 4820 Valves, Nonpowered · CAGE 8FGX3 · HL18122PC81 · 1494N · 1494N · HL-16253-83 · HL-20039 PIECE
Nearby stock numbers  ·
GATE VALVE PROFILE
4820-01-134-8845 — Valves, Nonpowered
Features
  • Seat,valve — FSC 4820
  • 1 manufacturer part number on file
  • Manufacturer of record: Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions
Identification
  • NSN: 4820-01-134-8845
  • NIIN: 011348845
  • FSC: 4820 — Valves, Nonpowered
  • FSG: 48 — Valves
  • Primary part number: HL18122PC81
  • Manufacturer: Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions
General Description

The Seat,valve, cataloged under National Stock Number 4820-01-134-8845, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 8 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-134-8845
Primary Part NumberHL18122PC81
Item NameSeat,valve
FSC / FSG4820 / 48 — Valves, Nonpowered
ManufacturerCurtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
DEMIL CodeDEMIL A — No Demilitarization Required
HazardNo hazard code in the DLA record (HMIC N)
Criticality CodeX
⇄ Related Items 8
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4310-01-134-88815482N POSSIBLE MATCH
PLATE,FLOATING
Possible match (shared part number)Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions
4310-01-134-8882COV175 POSSIBLE MATCH
COVER,PLAIN
Possible match (shared part number)Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions
4310-01-135-0278GRD-578A POSSIBLE MATCH
GUARD,VALVE
Possible match (shared part number)Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions
4310-01-135-0279SHF119 POSSIBLE MATCH
SHAFT,OIL PUMP
Possible match (shared part number)Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions
4310-01-135-02805481N POSSIBLE MATCH
PLATE,STATIONARY
Possible match (shared part number)Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions
4310-01-148-95571933N POSSIBLE MATCH
CYLINDER,RECIPROCATING COMPRESSO
Possible match (shared part number)Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions
4310-01-181-8521BAF354 POSSIBLE MATCH
BAFFLE
Possible match (shared part number)Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions
4310-01-189-3275FGR27 POSSIBLE MATCH
FINGER ASSEMBLY
Possible match (shared part number)Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions
Cross-Reference Index
Part NumberManufacturer
HL18122PC81 PRIMARY Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions (USA)
Reference documents
ReferenceMeaning
1494N C/1 Advisory reference — outside the item-of-supply concept
U.S. Government activity
1494N 5/9 Secondary reference
U.S. Government activity
HL-16253-83 C/1 Advisory reference — outside the item-of-supply concept
U.S. Government activity
HL-20039 PIECE C/1 Advisory reference — outside the item-of-supply concept
U.S. Government activity
HL18122PC81 5/9 Secondary reference
Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions
HL18122PC81 3/9 Design control — primary reference
Siemens Energy, Inc. Dba Dresser-Rand
HL18122PC81 5/9 Secondary reference
U.S. Government activity
HL18122 D/9 Drawing number reference only
U.S. Government activity
Related Parts
4310-01-134-8881POSSIBLE MATCH
PLATE,FLOATING
5482N
4310-01-134-8882POSSIBLE MATCH
COVER,PLAIN
COV175
4310-01-135-0278POSSIBLE MATCH
GUARD,VALVE
GRD-578A
4310-01-135-0279POSSIBLE MATCH
SHAFT,OIL PUMP
SHF119
4310-01-135-0280POSSIBLE MATCH
PLATE,STATIONARY
5481N
4310-01-148-9557POSSIBLE MATCH
CYLINDER,RECIPROCATING COMPRESSO
1933N
4310-01-181-8521POSSIBLE MATCH
BAFFLE
BAF354
4310-01-189-3275POSSIBLE MATCH
FINGER ASSEMBLY
FGR27

Frequently Asked Questions

What is NSN 4820-01-134-8845?

NSN 4820-01-134-8845 is a Seat,valve, manufactured by Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-134-8845?

NSN 4820-01-134-8845 has 1 manufacturer part number on file: HL18122PC81 (Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions).

What NSN replaces 4820-01-134-8845?

8 possible matches (shared part number, not a government interchangeability claim): 4310-01-134-8881, 4310-01-134-8882, 4310-01-135-0278. Verify interchangeability with system specifications before substitution.

What are the specifications of HL18122PC81?

Key specifications for HL18122PC81: End Item Identification: WORTHINGTON COMPRESSOR SIZE 7/7/5-3/4X5 6 CYL. 0 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-134-8845 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.

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✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.
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