GRACO 237958 - Uhmwpe/Leather Packings Stubby Length Stainless Monark 23:1 Pneumatic 2-Ball Piston

Monark 23:1 pneumatic 2-ball piston pump engineered for high-performance fluid handling applications. Features stainless steel construction with stubby length design for compact installations. Equipped with UHMWPE/Leather packings for reliable sealing when handling solventborne and waterborne fluids, high solids coatings, resins, stains, lacquers, varnishes, cleaning fluids, and acid-catalyzed materials.

Specifications

• Ratio: 23:1
• Flow Rate: 27 cc output per cycle, 0.4 fl (1.5) output at 60 CPM gpm (lpm)
• Length: stubby
• Max Working Pressure: 3450 psi (238 bar) maximum working pressure, 150 psi (10.3 bar) maximum input air pressure
• Material: Stainless Steel (SST) with UHMWPE/Leather packings
• Pump Type: SST Monark Pump
• Operation: pneumatic
• Pump Outlet Size: 3/8 nptf(f)
• Pump Inlet: 3/4 nptf(m)
• Air Input Pressure: 150 psi (1.0 MPa, 10.4 bar) Maximum Air input Pressure
• Ratio: 23:1
• Certification: II 1/2 G Ex h IIB T3 Ga/Gb CML 24ATEX6021X
• Displacement Pump Part: 239145
• Series: Series B

Features

• 23:1 pressure ratio for high-pressure output
• Stubby length design for compact installations
• Stainless steel construction for durability
• UHMWPE/Leather packings for chemical compatibility
• 2-ball piston design for consistent flow
• 3/8 nptf(f) outlet and 3/4 nptf(m) inlet connections

Applications

• Solventborne and waterborne fluids
• High solids, plural component coatings
• Resins
• Stains, lacquers and varnishes
• Cleaning fluids
• Acid-catalyzed materials

Compatible Equipment

• HYDRA-SPRAY systems

Related Parts

• 218763 - Monark 1.5:1 Pneumatic 2-Ball Piston Pump, SS, Stubby Length
• 223186 - Leather Stubby Length Cs Monark 2:1 Pneumatic 2-Ball Piston Pump
• 224350 - Stainless Uhmwpe/PTFE Packings Drum Length SS Monark 5:1 Pneumatic 2-Ball Piston Pump
• 224343 - Monark 5:1 Pneumatic 2-Ball Piston Pump, SS, UHMWPE/PTFE Packings
• 224345 - Monark 5:1 Pneumatic 2-Ball Piston Pump, SST, UHMWPE/Neoprene Packings
• 218956 - Carbon Steel Monark 5:1 Pneumatic 2-Ball Piston Pump, 35 Bar (3.5 MPa
• 239327 - Monark 15:1 Pneumatic 2-Ball Piston Pump, CS, Stubby Length, UHMWPE/Leather Packings
• 223844 - 15:1 Ratio Monark Pump, Series A, 2700 psi max fluid working pressure, 180 psi max air input pressure
• 223596 - Leather Monark 23:1 Pneumatic 2-Ball Piston Pump, 3450 PSI (238
• 223595 - Severe-Duty Displacement Pump

Kit Contents

• 101946 - PIN, cotter, stainless steel
• 101566 - NUT, lock, 3/8-16
• 154771 - SEAL, o-ring, buna-N
• 164722 - ROD, tie, carbon steel
• 222791 - AIR MOTOR
• 239145 - DISPLACEMENT PUMP ASSY, stainless steel

Part of the Monark Pneumatic 2-Ball Piston Pump family. Pump manual assembly part number: 307619, Lower manual: 307619, Motor manual: 307043 For airless and air-assisted spraying of finishing materials. For professional use only. Severe-duty displacement pumps have abrasion-resistant displacement rods and sleeves. Model 237958 includes items 3, 4, 6, 10, 12, and 14. Part 14 (239145) is the displacement pump assembly specifically for pump Model 237958. There is a repair kit available (235636) that may be purchased separately.

Reference Manuals

• 344905 (Page 7) Supply Pumps Brochure
• 307619 (Page 1) Monark® and President® Pump
• 308635 (Page 17) Cart-Mounted Airless Packages
• 308690 (Page 15) art-Mounted Air Assisted Packages
• 308693 (Page 17) Cart-Mounted, Heated Air-Assisted Packge