Product Overview
Unused Dresser-Rand 28CS3WSM Inlet Valve Seat with Light Storage Wear
This Ingersoll-Rand inlet valve seat, Dresser-Rand part number 28CS3WSM, is a precision-machined OEM component used in reciprocating compressor inlet valve assemblies. It provides the fixed sealing surface that the valve element closes against, helping maintain gas tightness, volumetric efficiency, and stable compressor operation.
Dresser-Rand parts often spend years in plant stockrooms or service inventories, carried forward through equipment upgrades and maintenance cycles. This seat comes from that kind of environment: unused, preserved, and waiting for its first installation, but showing the cosmetic evidence of long-term shelf life.
Product Condition
Unused new old stock. The part shows visible storage marks and handling wear, including surface scuffs and discoloration, but no signs of installation or operational use. Cosmetic wear does not affect the functional sealing geometry.
Product Overview
The 28CS3WSM valve seat forms the primary interface between incoming process gas and the compression chamber. During the suction stroke, differential pressure lifts the valve element off the seat to admit gas. When pressure reverses, the element returns to the seat, and the condition of this metal-to-metal interface controls leakage, efficiency, and temperature in the valve pocket.
Although exact dimensions and metallurgy for 28CS3WSM are proprietary to the OEM, seats of this type are typically engineered for high-cycle fatigue resistance, precise flatness, and erosion resistance in demanding gas service. This component is intended for a specific frame and valve configuration; always match it to your compressor’s bill of materials.
Key Features
- OEM Dresser-Rand part number 28CS3WSM
- Ingersoll-Rand reciprocating compressor inlet valve seat
- Forms the fixed sealing surface for valve plate/channel/poppet elements
- Supports efficient gas intake and controlled leakage
- Machined for alignment within the valve pocket
- Unused NOS with cosmetic wear from long-term storage
Applications
- Overhaul and maintenance of IR/Dresser-Rand reciprocating compressors
- OEM-spec replacement of worn inlet valve seating surfaces
- Restoring volumetric efficiency and reliable valve timing
- Process gas, air, and inert gas compression service
- Valve rebuild work where seating integrity is critical
Frequently Asked Questions
Is this component unused?
Yes. It is unused new old stock and has not been installed or run in a compressor.
Why does it show cosmetic wear?
The part was kept in storage without its original packaging, leading to surface scuffs and discoloration. These do not affect the valve seating function.
Does the wear impact sealing performance?
No. The marks are cosmetic and located on non-critical surfaces. The functional geometry should still be verified during installation per OEM practice.
How do I confirm compatibility?
Match Dresser-Rand part number 28CS3WSM to your compressor’s parts list or valve drawing. This component is typically frame- and cylinder-specific.
What are common failure modes for seats like this?
Operational wear usually comes from erosion, pitting, or impact fatigue. Replacing a seat prevents these issues from reducing efficiency.
Stored away for years yet untouched by service, this seat carries the look of a part that waited through multiple maintenance cycles before being needed. Now its next chapter begins when you put it back into a working compressor.
