IWATA LPH400 Spray Guns and Parts

Name: IWATA 93594532 Fluid Adjust Knob
Brand: Iwata
SKU: 93594532
Price: 20.51 USD
Availability: InStock

Collection: IWATA LPH400 Spray Guns and Parts

The IWATA LPH400 spray gun is an industry-standard gravity-feed atomizer engineered for automotive refinish, industrial coating, and general manufacturing applications. This collection supplies both complete IWATA 400 spray gun units and individual replacement parts—fluid needles, air valve seats, cartridge packing, and rebuild kits—enabling shops to maintain equipment uptime without full-gun replacement. Whether you're stocking a production line or servicing existing tools, the LPH400 delivers consistent atomization and is backed by OEM-certified components. Buyers choose this spray gun for its durability, ease of disassembly for cleaning, and availability of dedicated repair service kits that extend equipment life.

How to Choose the Right IWATA LPH400 Spray Guns and Parts

Verify spray pattern type (round, fan, or adjustable) matches your application coating viscosity.
Confirm fluid needle and air valve seat materials (hardened steel, stainless) for chemical compatibility.
Check cartridge packing and PTFE seal condition; worn seals cause fluid leakage during idle.
Match fluid adjust knob and guide set to your existing gun model to avoid fitment errors.
Review rebuild kit contents: ensure air valve shaft, fluid needle spring, and seat set are included.
Confirm air pressure range (typically 25–40 PSI for LPH400) aligns with your compressor output.
Stock repair service kits proactively; downtime costs exceed part replacement.

Model Comparison

Part Category	Part Number	Primary Function	Material / Spec	Typical Use
Fluid Adjustment	IWATA 93594532	Fluid Adjust Knob	Hardened Polymer	Fine-tuning fluid flow without disassembly
Air Valve Assembly	IWATA 93591530	Air Valve	Stainless / Hardened Steel	Primary air atomization control
Sealing / Packing	IWATA 93765610	Cartridge Packing (PTFE)	PTFE with Spring	Prevents fluid weeping; core seal replacement
Rebuild Kit (Complete)	IWATA 5650 W-400/LPH400	Repair Service Kit-B	Multi-part OEM kit + PTFE Cartridge	Full restoration; economical alternative to gun replacement
Valve Seat	IWATA 93843530	Air Valve Seat Set	Hardened Stainless Steel	Sealing surface for air control; worn seats reduce atomization

Frequently Asked Questions

What is the difference between the LPH400 and LPH400LV?

The LPH400LV is a low-volume, low-pressure variant of the standard LPH400, designed for HVLP compliance and reduced overspray in confined spaces. Both share core rebuild parts, but pressure specifications and fluid delivery rates differ. Confirm your compressor capacity before selecting; LV models require less air input.

How often should I rebuild my IWATA LPH400 spray gun?

Rebuild annually or after 200+ spray hours, whichever comes first. Signs include fluid leakage from the fluid needle, erratic spray pattern, or audible air chatter. The IWATA 5650 Repair Service Kit-B simplifies maintenance; cartridge packing and air valve seats are wear items.

Can I mix and match parts from different IWATA gun models with the LPH400?

No. The LPH400 uses a proprietary needle diameter, seat geometry, and packing size. Cross-fitting parts from other IWATA models (e.g., LPH50, LPH80) causes poor sealing, fluid leakage, and spray pattern failure. Always verify part number compatibility.

What causes fluid weeping when the gun is idle?

Worn or damaged cartridge packing (PTFE seal) is the primary culprit. The IWATA 93765610 Cartridge Packing replaces this; also inspect the fluid needle and air valve seat for scratches or deposits. Clean before reassembly; sediment prevents a tight seal.

Is the IWATA LPH400 suitable for clear coat and urethane primers?

Yes. The LPH400 is OEM-approved for automotive refinish including clear coats, urethanes, and acrylics. Ensure fluid needle and cartridge packing materials (PTFE, stainless steel) are compatible with your specific coating chemistry. Always strain material before spraying.