The GRACO A25818 is a pneumatically operated chemical injection pump designed for high-pressure, reliable chemical dosing in demanding environments. It features a 4-1/2 inch air motor, a Chromex coated 5/8 inch plunger, and FFKM seals for chemical resistance. The pump is constructed with 316 stainless steel fluid sections and is ATEX approved for use in hazardous areas. It is intended for use in oilfield, industrial, and process applications where precise chemical injection is required.

Key Features:

• Pneumatic chemical injection pump
• Python XL, 4-1/2 in Air Motor, 5/8 in Plunger
• 316 stainless steel fluid section/wetted parts, Chromex coated plunger, FFKM seals
• Up to 12,000 psi
• Interchangeable lowers with other Python XL models; compatible with various chemical injection systems
• ATEX approved
• Modular air valve design for easy serviceability
• Removable pilot valve
• Plunger packings replaceable in 10 minutes or less
• Low air/gas consumption for efficiency
• Muffler for low operation noise (<70 dBa)
• Three stroke adjustment positions
• Adjustable packing seals for better sealing and increased pump life
• 97% recoverable exhaust gas, reduced fugitive methane emissions
• Proven GRACO Merkur air motor technology

Applications:
Ideal for chemical injection in oilfield, industrial, and process applications, especially in wells with low gas pressure or where high-pressure, reliable chemical dosing is required.

Installation Notes:

• Using genuine GRACO parts ensures optimal performance, safety, and compatibility with existing systems.
• Ensure all connections are secure and compatible with the pump’s inlet/outlet sizes (typically 1/4 in. NPT for inlet, with adapters included)
• Verify air supply is clean and at the correct pressure (minimum 15 psi required)
• Install muffler to reduce noise
• Follow ATEX guidelines for installation in hazardous areas
• Regularly inspect and replace plunger packings and seals as needed
• Replace plunger packings and seals every 10 minutes or less as required
• Check air valve and pilot valve for smooth operation
• Monitor for leaks and unusual noise
• Use only recommended lubricants and replacement parts