Product Name: Poppet Pin / Spring Guide (Check Valve) – Part No. 05116751

Description:
This component is a precision-engineered poppet pin, also known as a spring guide, specifically designed for the high-pressure outlet check valve (discharge check valve) assembly in waterjet intensifier pumps . The part is also referred to as a "Retainer Poppet" and is a standard component in high-pressure maintenance kits for waterjet cutting equipment .

The poppet pin serves as a critical positioning and guide element within the outlet check valve. It is installed between the discharge poppet (flat outlet poppet) and the compression spring, ensuring that the spring remains correctly centered and aligned with the poppet during high-frequency valve operation. This alignment is essential for the valve to open and close cleanly under extreme pressure conditions up to 60,000 PSI (approximately 4,137 bar) .

This component is included in check valve repair kits for .875 inch plunger intensifier systems, such as KMT repair kit 80074057 and WK000377, which contain parts for both inlet and outlet check valve overhaul . In the sealing head assembly (Part No. 20458908), the poppet pin is listed as Item 7, working in conjunction with the poppet retainer, inlet poppet, discharge poppet, and valve seat . It is suitable for use in Streamline SL-IV, SL-V, SL-VI, and Neoline series intensifier pumps .

Applications:

• Serves as a spring guide and alignment pin within the outlet (discharge) check valve assembly of waterjet intensifier pumps 

• Installed between the flat outlet poppet (05116561) and the compression spring (05147863) to maintain spring centering and poppet alignment 

• Positioned inside the sealing head assembly (20458908) as a retainer for valve components 

• Suitable for ultra-high pressure waterjet systems operating at 60,000+ PSI (approximately 4,137 bar)

• Compatible with .875 inch plunger intensifiers including SL-IV, SL-V, SL-VI, and Neoline series pumps 

Features:

• Precision-Machined Construction: A small, accurately machined component ensuring proper spring alignment and smooth poppet movement 

• Spring Guide Function: Centers the compression spring to prevent lateral movement and ensure consistent spring force application

• Poppet Alignment: Maintains axial alignment between the discharge poppet and valve seat for reliable sealing

• Critical Subcomponent: Included as a core component in high-pressure check valve repair kits for .875 plunger systems 

• Kit Integration: Part of the KMT repair kit 80074057 (WK000377) which includes seat, discharge poppet, spring, and pin 

• OEM Compatibility: Direct replacement part for KMT, AccuStream, and other standard waterjet intensifier systems

Maintenance:

Failure Diagnosis:

• Check Valve Performance Issues: If the intensifier exhibits pressure drop, erratic cycling, or overheating of the check valve body, internal wear of the poppet pin or spring may be contributing

• Spring Misalignment: A bent or worn poppet pin can cause the compression spring to lose alignment, leading to incomplete valve closure

• Visible Wear During Overhaul: When disassembling the sealing head assembly, inspect the poppet pin for signs of bending, scoring, wear, or corrosion. Even minor surface damage warrants replacement

Replacement and Inspection Guidelines:

• Replace as Part of Complete Kit: When servicing the outlet check valve, it is recommended to replace the poppet pin simultaneously with the discharge poppet (05116561), valve seat (05112768), and compression spring (05147863) as a complete set 

• Kit Information: The poppet pin is included in check valve repair kits (KMT# 80074057, 20489495, WK000377) for .875 plunger intensifier pumps 

• Proper Assembly: During reassembly, ensure the poppet pin is correctly positioned between the spring and the poppet. The pin should seat properly within the spring coils to maintain centering

• Clean Installation: Perform the rebuild in a clean area. Remove the old poppet pin and thoroughly clean the spring cavity before installing new components

• Full Depressurization: Always fully depressurize the waterjet system and follow lockout/tagout procedures before disassembling the sealing head or check valve assembly

• Spring Inspection: When replacing the poppet pin, inspect the compression spring for fatigue, corrosion, or loss of tension; replace if any damage is detected 

Cross-Reference Information:

• OEM: KMT #05116751

• Also known as: Spring Guide, Flat Outlet Poppet 

• Component of repair kits: 80074057, 20489495, WK000377 

• Used in sealing head assembly: 20458908 (Item 7)