Parker Schrader Bellows N3556904553 Solenoid Valve 120VAC

Parker Schrader Bellows N3556904553 N-Series Solenoid Valve 120VAC

The Parker Schrader Bellows N3556904553 is a high-flow inline poppet-style directional control valve engineered for rapid cycle times and harsh industrial or marine operating environments. Configured as a 3-Way, 2-Position Normally Closed (3/2 NC) pneumatic control unit, this N-Series valve provides immediate flow delivery with minimal pressure drop.

Designed with a robust cast-aluminum body, Buna-N seals, and an epoxy resin-encapsulated single solenoid, it resists moisture ingress, mechanical shock, and continuous duty vibration. The valve integrates a conduit junction box housing with a neon indicator light, a locking manual override (LMO), and an internal pilot feed rated up to 140 PSI (9.65 bar).

Technical Details

Manufacturer Cross-Reference

• Parker Hannifin: N3556904553
• Schrader Bellows Legacy: N-3556-9045-53 / 3556-904553
• Radwell Part ID: N3556904553-PB
• Applied Industrial Item ID: 100559483

Valve Features

1. High-Velocity Poppet Architecture: Delivers high flow with short mechanical travel, ensuring instant fill and dump times under cyclic loading.
2. Oversized 1″ NPT Exhaust Port: Prevents backpressure buildup on rapid cylinder return or clutch disengagement, reducing system hysteresis.
3. Integrated Conduit Junction Box with Run Light: Sealed NEMA 4/IP65 electrical head with built-in visual power indication for instant electrical status verification.
4. Locking Manual Override (LMO): Permits sustained mechanical locking of the spool for unpowered emergency actuation, air dump, or maintenance troubleshooting.
5. Corrosion-Resistant Cast Body: Epoxidized solenoid encapsulation combined with marine-grade coated cast aluminum stands up to damp, salt-laden atmospheres.

Frequently Asked Questions

Can the Parker N3556904553 valve be used with 110V 50Hz shipboard power?

Yes. The standard dual-frequency Class B coil is rated for both 120VAC at 60 Hz and 110VAC at 50 Hz. This makes it plug-and-compatible with North American land-based automation as well as standard 110V 50Hz marine auxiliary power networks.

What happens if the supply pressure falls below 30 PSIG?

Because this model uses an internal pilot connection (45 pilot code), it relies on line pressure from the inlet port to actuate the poppet piston. If line pressure drops below 30 PSIG (2.07 bar), the pilot pressure may not overcome the return spring, causing the valve to fail to shift or exhaust incompletely.

How do I operate the Locking Manual Override (LMO)?

Depress the slotted override pin on the junction box operator using a flat-head screwdriver and twist it 90 degrees clockwise. This locks the poppet into the energized (open) state without electrical supply. Always disengage the lock before returning to remote PLC or solenoid control.

Can I rebuild this valve, and are repair kits available?

Yes. The poppet assemblies, body seals, and pilot valve seats are fully modular. Standard Parker Schrader Bellows seal overhaul kits (Buna-N or Fluorocarbon/FKM) and replacement coil assemblies can be installed in-place without unthreading the main 3/4″ pipe body from the manifold.

Can this 3-way valve be configured as a Normally Open (NO) valve?

No, the N3556 model is mechanically configured as Normally Closed. To obtain a Normally Open function in the 3/4″ body series, the corresponding N385-series valve body is required.