Product Overview
This Pilot Valve Seat is a high-precision valve sleeve engineered for aviation fuel systems where stability, flow accuracy, and durability are critical. The part is designed with multiple functional grooves and through-holes that support controlled fuel passage and precise mechanical alignment. Its consistent geometry and tight tolerances ensure smooth integration into aerospace fuel control components.
Material & Technical Specifications
Manufactured from 17-4PH stainless steel in H1150 condition, the valve seat meets the performance requirements of ASTM A564, delivering high strength, corrosion resistance, and long-term dimensional stability in demanding aviation environments. A dry-film lubricant coating is applied to reduce friction and wear during continuous operation.
Dimensional Specifications (mm)
| Specification | Value |
|---|---|
| Length | 55 mm |
| Outer Width | 15.9 mm |
| Inner Bore Diameter | 8.03 mm |
| Deburring / Chamfer | 0.2–0.4 mm |
| Coaxial Runout | ≤ 0.25 mm |
| Surface Roughness | ≤ Ra 0.4 |
| Unspecified Angles | ±0.5° |
All dimensions are controlled to ensure precision fit, smooth flow characteristics, and stability during long-term service.
Structural Features
The Pilot Valve Seat incorporates a central precision-machined bore, multiple exterior grooves for sealing or positioning control, and two accurately spaced through-holes to support fuel metering or mechanical alignment.
All surfaces are deburred, chamfered, and coated with dry-film lubricant to:
Minimize friction
Prevent metal-to-metal wear
Improve operational reliability
Ensure safe assembly and long service life
The overall structure is optimized for consistent flow and high stability under pressure and vibration.
Applications & Performance
This valve seat is specifically used in aviation fuel delivery and metering assemblies, including:
Pilot-operated fuel control valves
Precision flow regulation units
Fuel metering modules
Aerospace hydraulic/fuel hybrid components
Its combination of 17-4PH strength, ultra-smooth surface finish, and reliable lubrication system ensures:
Accurate fuel control
Excellent wear resistance
High fatigue strength
Long-term dimensional consistency
FAQ – Pilot Valve Seat
Q: What material is used for this Pilot Valve Seat?
A: It is made from 17-4PH stainless steel (H1150), offering high mechanical strength, corrosion resistance, and stability for aviation fuel environments.
Q: Is the surface treated with lubrication?
A: Yes. A dry-film lubricant coating is applied to reduce friction and improve wear performance under continuous movement.
Q: What tolerance controls are applied?
A: Critical areas maintain ≤0.25 mm coaxial runout, 0.2–0.4 mm deburring, and Ra 0.4 or better surface roughness, supporting reliable sealing and smooth fuel flow.
Q: Can the valve seat be customized for specific aerospace applications?
A: Yes. Dimensions, groove design, hole spacing, and coating options can be tailored based on OEM or program requirements.
Q: Where is this part used?
A: It is widely used in aviation fuel control units, pilot-operated valves, and systems requiring precise metering and stable flow performance.
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