Description
Heavy-Duty NPT Series: Nickel-Plated Brass Cable Glands
1. Product Overview
The Clifnor NPT-Series is specifically engineered for the North American market and global projects utilizing tapered pipe thread standards. These glands provide an exceptional, high-pressure seal for explosion-proof enclosures, industrial control panels, and outdoor power distribution. The combination of a rugged nickel-plated brass body and an advanced Nylon PA clamping system ensures superior strain relief and vibration resistance in the most demanding environments.
2. Technical Specifications
| Feature | Industrial Specification |
| Thread Standard | NPT (ANSI/ASME B1.20.1) |
| Ingress Protection | IP68 – 10 Bar (High-pressure water resistance) |
| Operational Temp. | -40°C to 100°C (Static) / Up to 120°C (Instantaneous) |
| Body Material | Nickel-Plated Brass (H59-1 / H62 standard) |
| Sealing Elements | NBR (High-performance Nitrile Rubber) |
| Clamping Insert | Nylon PA66 (UL-94 V2) |
3. Engineering & Performance Advantages
-
Precision Tapered Sealing: The NPT thread design provides a metal-to-metal wedge seal, which, when combined with our NBR O-ring, ensures a gas-tight and liquid-tight connection.
-
Audible Locking System: The sealing nut features an integrated “click” feedback mechanism. This ensures installers achieve the correct torque, preventing the gland from loosening under thermal expansion or heavy machinery vibration.
-
Corrosion Resistance: The electro-plated nickel finish acts as a shield against salt spray, weak acids, alcohols, and industrial greases. It is particularly effective in preventing galvanic corrosion when mounted on galvanized steel or aluminum enclosures.
-
Extended Clamping Range: The unique “claw” design allows a single gland size to accommodate a wide variety of cable diameters without compromising the IP68-10 Bar rating.
4. Strategic Industry Applications
-
Oil & Gas / Petrochemical: Secure cable entry for sensors and monitoring equipment on refineries and offshore rigs.
-
Heavy Machinery: Vibration-proof connectivity for motors, pumps, and generators.
-
Power Distribution: Weatherproof sealing for transformers and outdoor junction boxes.
-
Infrastructure: Tunnel lighting, bridge sensors, and traffic control systems exposed to harsh weather.
5. Technical Selection Table (NPT)
| Item No. | Thread Size (NPT) | Cable Range (mm) | Thread Length (mm) | Spanner Size (mm) |
| GS-NPT1/4 | NPT 1/4″ | 3 – 6.5 | 8 | 14 |
| GS-NPT3/8 | NPT 3/8″ | 4 – 8 | 12 | 18 |
| GS-NPT1/2 | NPT 1/2″ | 6 – 12 | 15 | 22 |
| GS-NPT3/4 | NPT 3/4″ | 13 – 18 | 15 | 30 |
| GS-NPT1″ | NPT 1″ | 18 – 25 | 15 | 40 |
| GS-NPT1-1/2″ | NPT 1-1/2″ | 32 – 38 | 18 | 57 |
6. Customization & Compliance
-
Material Variants: Stainless Steel (SS304/SS316) is available for food-processing or highly acidic environments.
-
Alternative Sealing: EPDM for enhanced UV resistance or FKM (Viton) for high-heat chemical applications.
-
Thread Customization: Specialized lengths for thick-wall casting enclosures are available upon request.
| Code 产品编号 |
Thread 螺牙规格 |
Cable Range (mm) 适用电缆 |
Thread Diameter AG (mm) 螺纹外径 |
Thread Length GL (mm) 螺纹长度 |
Joint Length H (mm) 接合长度 |
Spanner Size (mm) 扳手径 |
|---|---|---|---|---|---|---|
| NPT1/4-MT | NPT1/4 | 3-6.5 | 13.7 | 7 | 19 | 14 |
| NPT3/8-MT | NPT3/8 | 4-8 | 17.1 | 8 | 18 | 18 |
| NPT1/2-MT | NPT1/2 | 6-12 | 21.3 | 8 | 22 | 22 |
| NPT3/4-MT | NPT3/4 | 13-18 | 26.6 | 9 | 25 | 30 |
| NPT1-MT | NPT1 | 18-25 | 33.2 | 10 | 29 | 40 |
| NPT1-1/4-MT | NPT1-1/4 | 25-33 | 42 | 12 | 35 | 50 |
| NPT1-1/2-MT | NPT1-1/2 | 32-38 | 48 | 13 | 37 | 56 |
| NPT2-MT | NPT2 | 37-44 | 60 | 14 | 38 | 64 |
| NPT2-1/2-MT | NPT2-1/2 | 42-52 | 72.6 | 15 | 39 | 78 |
| NPT3-MT | NPT3 | 65-70 | 88.6 | 15 | 45 | 98 |