ARO 104104-N02 1/4 in. Needle Valve | 28 SCFM, 200 PSI
Control ARO diaphragm pump speed with the 104104-N02 composite needle valve, featuring 1/4 in. NPT ports, 28 SCFM flow and 200 psi max inlet.
ARO 104104-N02 In-Line Composite Needle Valve
The ARO 104104-N02 is a compact in-line pneumatic needle valve designed for precise airflow adjustment in compatible industrial pneumatic systems and ARO diaphragm pump installations.
It features 1/4-inch NPT female ports, a published flow capacity of 28 SCFM and a 200 psi maximum inlet pressure.
Diaphragm Pump Speed Control
ARO specifically recommends the 104104-N02 for controlling the air volume supplied to compatible diaphragm pumps. Increasing or restricting airflow allows operators to adjust pump cycling speed and overall pumping rate.
The valve is intended for compatible 1/4-inch through 1-inch ARO diaphragm pumps.
1/4 Inch NPT Female Ports
The 104104-N02 uses 1/4-inch NPT female connections. Confirm fitting size and pneumatic line requirements before installation.
28 SCFM Flow Capacity
ARO lists the valve at approximately 28 SCFM. Actual airflow in an installed system depends on supply pressure, tubing size, fittings and downstream restrictions.
200 PSI Maximum Inlet Pressure
The published maximum inlet pressure is 200 psi. The valve should only be operated within the pressure, temperature and media limits specified for the pneumatic system.
Four-Stage Tapered Needle
The in-line composite needle valve uses a four-stage tapered needle design that provides a wide range of adjustable flow settings.
This allows the operator to fine-tune air delivery rather than relying only on fully open or fully closed operation.
Calibrated Adjustment Knob
The valve includes a color-coded micrometer-style calibrated adjustment knob. The scale provides reference points that make it easier to return to previously established airflow settings.
Locking Adjustment Ring
A red locking ring helps prevent unintended changes after the desired setting has been established. A tamper-resistant wire is also supplied for applications where adjustment security is important.
Composite Body
The 104104-N02 uses a lightweight composite housing designed to provide corrosion resistance in compatible industrial pneumatic environments.
Remote Panel Mounting
The valve body is threaded to support remote panel mounting. This makes it suitable for installations where the adjustment knob needs to remain accessible to the operator while pneumatic tubing is routed behind a panel.
ARO Pump Compatibility
ARO identifies the 104104-N02 for compatible:
- 1/4-inch diaphragm pumps
- 1/2-inch diaphragm pumps
- 3/4-inch diaphragm pumps where applicable
- 1-inch diaphragm pumps
- Compatible Compact, PRO and EXP Series installations
The complete pump model and air-consumption requirements should be checked before selection.
Related ARO Needle Valve Sizes
- 104104-N01: 1/8-inch NPT, 18 SCFM
- 104104-N02: 1/4-inch NPT, 28 SCFM
- 104104-N03: 3/8-inch NPT, 58 SCFM
- 104104-N04: 1/2-inch NPT, 90 SCFM
- 104104-N06: 3/4-inch NPT, 100 SCFM
Ordering ARO 104104-N02
Before purchasing, confirm:
- ARO part number 104104-N02
- 1/4-inch NPT female connection requirement
- 28 SCFM flow capacity
- 200 psi maximum inlet pressure
- Compatible diaphragm pump size
- Required airflow and pump-speed adjustment range
Using the exact manufacturer part number helps ensure the correct port size and airflow capacity are selected for the pneumatic system.
