NPD C Concealed Inward Tilt Turn System

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Product Description

Packaging & Delivery

Product Description

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Packaging & Delivery

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Product Description

Luoqi Door Systems

NPD C
Concealed
Tilt Turn System

Ultra-minimalist Aluminum Alloy Hardware featuring a fully hidden hinge architecture. The definitive Window Hardware choice for high-end residential facades requiring Premium Hardware Solutions.

430-1000mm Sash Width Range

< 90KG Structural Load Capacity

Seamless Aesthetics
Precision Structural Engineering

The NPD-C Concealed Inward Tilt Turn System is engineered for the next generation of architectural windows. By concealing the hinge components within the profile groove, Luoqi Door Systems has created a hardware solution that maintains the pure lines of modern window frames without compromising on functional versatility.

This system supports a broad spectrum of window dimensions, specifically catering to sash widths (FB) between 430mm and 1000mm. As a hallmark of Premium Hardware Solutions, the NPD-C ensures that even with its concealed nature, the aluminum alloy Hardware retains extreme durability and air-sealing precision, meeting the rigorous demands of contemporary building envelopes.

Technical Compliance

◈ Concealed Hinge Geometry
◈ Dual-Action Tilt & Turn Logic
◈ High-Performance Air Sealing
◈ Grade A Corrosion Resistance
◈ Optional Architectural Handles
◈ Optimized Load Distribution

System Specification Matrix

Configuration Item	Application Range & Suggestion	Hardware Status
Sash Width (FB)	430 mm — 1000 mm	Active Standard
Sash Height (FH)	Mandatory increase in locking points when FH exceeds 1500 mm	Safety Protocol
Operational Load	< 90 Kg	Static Verified
Lock Point Spacing	Suggested distribution within 700 mm	Sealing Optimize
Window Ratio (H/W)	Recommended maintain at 1.5 : 1	Ratio Suggestion

Structural Deployment Logic

Optimized Window Hardware for long-term geometric stability.

Concealed Width Versatility

The NPD-C series provides a massive application range for sash widths (FB) from 430mm to 1000mm. This flexibility allows architects to maintain a uniform concealed look across varying window sizes within the same facade.

Vertical Safety Architecture

When project specifications require window heights (FH) over 1500mm, our Premium Hardware Solutions protocol dictates an increase in locking points to counter potential profile deflection and ensure maximum security.

Optimized Sash Proportions

To preserve the structural integrity of the concealed hinges, we strongly suggest keeping the window height-to-width ratio at 1.5:1. This proportion minimizes gravitational torque, significantly extending the system's operational life.

Aesthetic Optionality

While the internal mechanisms of the Aluminum Alloy Hardware are hidden, the visible interaction point—the handle—remains fully optional in style, allowing for perfect customization with the interior hardware theme.

Installation & Configuration Advice

For procurement and installation teams deploying Luoqi Door Systems concealed technology, we advise strict compliance with the following engineering suggestions.

◈ Sealing & Spacing Suggestions

To maintain superior acoustic and thermal properties, keep the distribution spacing of lock points within 700mm. This ensures even compression of the window gaskets across the entire frame perimeter.

◈ Load Limit Restrictions

The NPD-C is meticulously balanced for total sash weights below 90Kg. Exceeding this limit may affect the smooth tilting movement of the concealed hardware components.