Yamada FR-4 1/2 in Filter-Regulator for NDP-40 Series Pumps
The Yamada FR-4 is a genuine Yamada air-line filter-regulator, with a 1/2 in compressed-air connection, matched to NDP-40 series AODD pumps. It mounts in the air supply line ahead of the pump and does two jobs at once: it filters out moisture, oil carryover and particulate before they reach the pump's air valve, and it regulates the line down to a set, steady inlet pressure.
Clean, dry, pressure-controlled air is what keeps an air-operated diaphragm pump's air valve cycling smoothly. Moisture and debris in the air supply are the leading cause of a pump that stalls, hunts, or cycles erratically, and running without pressure regulation makes stroke speed and discharge pressure track every fluctuation in shop air pressure instead of staying steady.
Key Features
- Genuine Yamada filter-regulator
- 1/2 in port connection
- Sized for NDP-40 series AODD pumps
- Filters and regulates the air supply
- Clear bowl for visual condensate check
Applications
- Protecting the pump air valve from moisture and debris
- Setting and holding a steady air-motor inlet pressure
- Marine, industrial and wash-down compressed-air installations
- New pump installations and air-supply upgrades
Specifications
- Brand: Yamada
- Manufacturer: Yamada America
- Part Number: FR-4
- Type: Filter-Regulator
- Port Size: 1/2 in
- Fits: NDP-40 Series Pumps
- Drain: Manual
- Condition: New
Frequently Asked Questions
Q: What is the difference between a filter-regulator and a filter-regulator-lubricator?
A lubricator adds a metered mist of oil to the air stream for air tools or air motors that need ongoing lubrication. Most Yamada AODD pumps do not require lubricated air, so a plain filter-regulator is the standard choice unless Yamada specifies otherwise for that model.
Q: Does an auto-drain model need to be manually emptied?
No. An auto-drain bowl vents accumulated condensate automatically, which is worth the extra cost in humid climates or continuous-duty installations where a manual-drain bowl would need frequent attention.
Q: Do I need one if my shop already has a dryer and filter on the compressor?
A central dryer/filter helps, but a unit mounted right at the pump still protects against condensation forming in the line between the compressor and the pump, and gives you pump-specific pressure control independent of the rest of the shop air system.
Q: How do I size the right filter-regulator for my pump?
Match the port size and the flow rating to the pump series it will feed - undersizing a filter-regulator restricts air delivery and can starve the pump of the volume it needs at full stroke rate.
Not sure this is the right part? Send us a picture of your Pump Plate to https://www.clrmarine.com/Contact-Us and the CLR Marine team will confirm the correct filter-regulator.
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