Overview
The Deltrol N25B 10000-79 is a variable flow restrictor needle valve manufactured by Deltrol Fluid Products under the Pneu-Trol brand. This direct-acting hydraulic valve is designed for inline flow control in pneumatic and hydraulic systems where precise, adjustable flow metering is required. The all-brass body with female-to-female 3/8″ NPT connections provides corrosion resistance and durability in industrial hydraulic, pneumatic, pump, and plumbing applications.
Key Features
- Variable flow adjustment with fine-thread tapered needle for precision metering
- Positive shut-off capability for complete flow isolation
- Locknut secures flow setting against vibration and inadvertent adjustment
- Tamperproof adjustment key included; optional knurled knob available
- Direct-acting design requires no external power or pilot pressure
- Brass construction resists corrosion in hydraulic oil and pneumatic environments
Technical Specifications
- Manufacturer Part Number: 10000-79
- Model: N25B
- Brand Line: Pneu-Trol
- Body Material: Brass
- Port Size: 3/8″ NPTF (National Pipe Thread Female)
- Connection Type: Female-to-Female Inline
- Maximum Operating Pressure: 2,000 PSI
- Maximum Flow Rate: 13.5 GPM
- Maximum Operating Temperature: +400°F
- Actuation Type: Direct Acting (Hydraulic)
- Seal Material: Fluoropolymer
- Mounting Type: Inline
- Overall Dimensions: 57.2 mm L × 27 mm W × 73.1 mm H
- Weight: 0.55 lbs
Typical Applications
- Pneumatic system flow control and pressure regulation
- Hydraulic pump discharge metering and flow balancing
- Industrial plumbing and water system throttling
- Manifold and valve cavity integration for custom fluid power circuits
- Equipment requiring precise, non-proportional flow restriction
- OEM machine tool and industrial automation systems
Compatibility & Replacements
Compatible With
- ISO 4401 (CETOP) standard manifold cavities
- Hydraulic fluid systems per ISO VG 10–ISO VG 68
- Pneumatic air systems (dry, filtered)
- Deltrol manifold blocks and cavity assemblies
- Industrial fluid power circuits rated to 2,000 PSI and below
Replaces / Drop-In Replacement For
- Verify compatibility with your system integrator or contact Deltrol directly for legacy model cross-reference information before ordering.
Works With
- Deltrol Pneu-Trol needle valve family (N25SK, N25SSK models)
- Standard NPT-threaded manifold and cavity blocks
- ISO 4401 proportional and directional control valve cavity systems
- Pneumatic and hydraulic fluid power standards (ISO 1219-1, ISO 4401)
