AR43238 Viton Seal Kit – OEM Replacement Part
Part Number: 3991
Category: Agricultural Pump Parts → Diaphragm & Seal Kits → AR Pump Repair Parts
Type: AR43238 Viton® Diaphragm Kit for AR45BP Pumps
The AR43238 Viton® Seal Kit (Part #3991) is a genuine OEM replacement diaphragm and seal kit designed for compatible AR45BP diaphragm pumps manufactured by Annovi Reverberi (AR Pumps). Engineered for demanding agricultural, soft wash, and chemical transfer applications, this repair kit helps restore pump performance, maintain pressure integrity, and extend equipment service life.
Key Features & Benefits
- Genuine AR Pumps OEM replacement repair kit
- Direct replacement for AR Part Number AR43238
- Replaces discontinued Part Number 9910-KIT42601
- Designed for AR45BP diaphragm pumps
- Premium Viton® diaphragm and sealing components
- Excellent chemical resistance
- Restores pump pressure and flow performance
- Helps prevent leaks and pressure loss
- Supports reliable pump operation
- Ideal for preventative maintenance and pump rebuilds
- Extends pump service life
- Reduces downtime and repair costs
Technical Specifications
Part Number: 3991
Manufacturer: AR Pumps (Annovi Reverberi)
Manufacturer Part Number: AR43238
Product Name: Viton® Diaphragm Kit
Pump Compatibility: AR45BP Diaphragm Pumps
Material: Viton®
Product Type: Diaphragm & Seal Repair Kit
OEM Replacement: Yes
Replaces: 9910-KIT42601
Why Choose Viton® Components?
Viton® elastomers are widely used in demanding chemical applications due to their:
- Excellent chemical resistance
- Superior durability
- High-temperature performance
- Long service life
- Resistance to agricultural chemicals
- Resistance to many solvents and cleaning agents
- Reliable sealing under demanding operating conditions
Common Applications
Agricultural Spraying
Ideal for:
- Fertilizer application systems
- Herbicide spraying
- Pesticide application
- Crop protection equipment
- Agricultural chemical handling
Soft Wash Systems
- Roof cleaning systems
- House washing equipment
- Bleach application systems
- Exterior cleaning equipment
Commercial & Industrial Applications
- Chemical transfer systems
- Industrial spraying equipment
- Fluid handling systems
- Pump maintenance and rebuilding
Performance Benefits
- Restores original pump efficiency
- Maintains proper operating pressure
- Improves flow consistency
- Reduces leakage
- Protects internal pump components
- Extends pump lifespan
- Improves overall reliability
- Supports consistent spraying performance
Signs Your AR45BP Pump Needs Diaphragm Service
Replace diaphragms and seals if you notice:
- Reduced pressure output
- Lower flow performance
- Chemical leaks
- Pulsating operation
- Difficulty maintaining pressure
- Worn or damaged diaphragms
- Excessive service hours
- Contaminated crankcase oil
Installation Notes
- Relieve all system pressure before servicing.
- Drain and flush the pump thoroughly.
- Disassemble the pump according to AR service procedures.
- Remove worn diaphragms and sealing components.
- Inspect valves and internal components for wear.
- Install new Viton® components from the kit.
- Reassemble according to manufacturer specifications.
- Test for proper pressure, flow, and leak-free performance.
Important: Inspect pump oil during service. If oil shows signs of chemical contamination, replace the oil and inspect all diaphragms immediately.
Maintenance Recommendations
- Monitor pump performance regularly.
- Inspect diaphragms during routine service intervals.
- Flush chemicals from the system after use.
- Replace worn diaphragms before failure occurs.
- Check pump oil condition frequently.
- Follow AR Pumps recommended maintenance schedules.
