Hydraulic orifice inserts deliver reliable, repeatable flow restriction and controlled pressure drop within fluid power circuits and manifold blocks. Designed for press-fit, threaded, or secured installation directly into fluid channels, these components eliminate the need for bulky external flow control valves. Engineered for continuous operation up to 400 bar (5800 psi), each part undergoes precision micro-drilling and stringent deburring to ensure predictable hydraulic performance and prevent downstream contamination.

Key Features

Optimized Flow Geometry: Controlled entry and exit geometries minimize flow separation, fluid turbulence, and cavitation risks.

High-Pressure Rating: Built to withstand severe pressure spikes and cyclic fatigue in mobile and industrial hydraulic systems.

Strict Deburring Standard: Internal bores are certified free of burrs and machining debris to protect sensitive downstream servo and proportional valves.

Space-Saving Integration: Direct-insert design reduces manifold block footprints, eliminates external piping leakage paths, and simplifies assembly layouts.

Technical Specifications

Parameter	Specification Details
Orifice Diameter Range	0.20 mm - 3.00 mm (Increments of 0.05 mm / Custom sizing available)
Diameter Tolerance	±0.01 mm (Standard), ±0.005 mm (High Precision)
Maximum Operating Pressure	Up to 400 bar (5800 psi)
Mounting / Thread Types	Press-fit (Cylindrical / Knurled), Metric Threads (M4 - M12), UNF/UN Threads
Operating Temperature Range	-40°C to +120°C (Material and seal dependent)
Compatible Media	Mineral-based oils (HL, HLP), synthetic hydraulic fluids, water-glycol mixtures

Materials & Machining Processes

Material Options

Stainless Steel (AISI 303 / AISI 316L): Selected for high corrosion resistance and chemical compatibility in harsh environments.
Free-Machining Steel (12L14 / 11SMnPb30): Optimized for high-speed CNC turning, paired with high-performance protective plating.
Brass (C36000 / CuZn39Pb3): Cost-effective option for non-corrosive industrial hydraulic applications.

Manufacturing & Quality Processes

CNC Swiss-Type Turning: High-precision turning centers maintain strict concentricity between outer diameters and internal bores within 0.005 mm.
Micro-Drilling & Reaming: Specialized carbide micro-drills achieve accurate orifice diameters without wall distortion.
Electrochemical / Thermal Deburring (ECD): Eliminates microscopic burrs at intersection edges to guarantee uniform flow coefficients (Cv).
Advanced Surface Finishing: Clear trivalent passivation for stainless steel; Zinc-Nickel plating delivering over 1000 hours of neutral salt spray resistance for carbon steel.

Applications

Hydraulic Manifold Blocks

Metering control flow to actuators and damping pilot lines.

Mobile Machinery

Excavators, loaders, agricultural equipment, and crane hydraulic control assemblies.

Industrial Presses & Machine Tools

Hydraulic clamping, braking, and feed rate regulation circuits.

Fluid Power Test Benches

High-pressure testing equipment and specialized hydraulic distribution units.

Customization & OEM Services

Build-to-Print Manufacturing: Production executed strictly to customer CAD files and engineering drawings (.STEP, .PDF, .DWG).

Custom Flow Engineering: Non-standard orifice dimensions engineered based on specific fluid viscosity, temperature, and target pressure drop calculations.

Part Identification: Laser marking of part numbers, size codes, or batch tracking numbers directly onto the flange or outer diameter.

Rapid Prototyping: Dedicated sample production lines available for new manifold development and bench testing.

Quality Control & Inspection

Dimensional Inspection: 2.5D optical measuring systems, laser micrometer gauges, and thread plug gauges verifying outer diameters, lengths, and thread pitches.

Flow Calibration Testing: Pneumatic or hydraulic test benches available to verify flow rate consistency against target parameters.

Full Material Traceability: Raw materials supplied with complete Material Test Reports (MTRs) compliant with EN 10204 3.1.

Aqueous Ultrasonic Cleaning: Parts processed through multi-stage ultrasonic cleaning lines to remove residual cutting oils and verified for particle cleanliness.

Packaging & Shipping

Corrosion Protection

Application of anti-rust oil and Vapor Corrosion Inhibitor (VCI) papers for carbon steel variants.

Secure Packaging

Anti-static blister trays, compartmentalized grids, or vacuum-sealed polyethylene bags to prevent transit damage and component mixing.

Export Logistics

Reliable international air and ocean freight shipping supported by complete commercial invoices, packing lists, and Certificates of Conformity.

Frequently Asked Questions

Q: What is the standard Minimum Order Quantity (MOQ)?

A: For standard catalog dimensions, the MOQ is 500 pcs. For custom-engineered orifice inserts, the MOQ starts at 1,000 pcs per size to cover specific tooling and setup calibrations.

Q: What is the standard production lead time?

A: Standard catalog items ship within 2 - 3 weeks. Custom production runs typically require 4 - 5 weeks following drawing approval and material confirmation.

Q: What 2D/3D drawing formats do you accept?

A: We accept .STEP, .IGES, .DWG, and .PDF formats. PDF engineering drawings must clearly specify critical tolerances, surface roughness (Ra), and material grades.

Q: How do you prevent internal burrs from entering hydraulic circuits?

A: We combine micro-boring precision tooling with electrochemical deburring (ECD) and strict microscopic inspection to ensure zero loose burrs or trapped chips.

Q: Can you supply flow test data with shipments?

A: Yes. Upon request, we can perform sample or 100% flow calibration tests and include a detailed inspection report confirming measured flow rates against nominal requirements.

Q: What surface treatments do you offer for corrosion protection?

A: We provide zinc-nickel plating (>720 hours red rust protection), black oxide, stainless steel passivation, and electroless nickel plating tailored to your operating environment.