Z Clevis

Raw material: Hot-dip galvanized Q235 steel Applicable scene：

Right-angle steering connection for insulator strings on distribution towers Available models: Z-0780, Z-1080, Z-12100, Z-16100, Z-21100

Raw material：Hot-dip galvanized Q235 steel
Applicable scene：Tension node steering for medium voltage transmission lines
Available models：Z-25110, Z-32135, Z-42150

Z clevis, also called right-angle clevis, is a standard steering connection hardware for overhead power lines and substations. It connects insulator strings and conductor clamps via bolt assembly to form stable suspension or tension sets. Thanks to its dual-axis rotatable structure, the fitting can adapt to multi-angle tension directions and buffer impact force brought by conductor pulling. All Z clevis are forged from Q235 carbon steel with full hot-dip galvanizing, zinc coating thickness ≥60μm to cope with long-term outdoor rusting. Precision machining ensures consistent dimensions and reliable overload resistance. The whole series features easy on-site assembly, low maintenance cost and neat uniform appearance after installation

Standard Step-by-Step Installation Guide
Follow this standardized operation process to avoid eccentric load and assembly defects：
Pre-installation Check & Tool Prep
Confirm the clevis model matches construction drawings; inspect galvanized surface for rust, peeling or scratches. Prepare matched bolts, torque wrench, laser level and electric drill;
Position Calibration
Use laser level to mark installation reference lines. Control vertical tolerance within ±2mm; check bending angle of Z clevis at complex tower structures to avoid forced distortion during assembly;
Bolt Assembly
Reserve 1–2mm clearance between hole diameter and bolt shank to eliminate deformation risk from thermal expansion and contraction;
Multi-Angle Position Adjustment
Utilize the dual-axis rotating feature of Z clevis to align the fitting with actual tension direction of insulators and wires. For overlapping connection positions, keep overlap length over 40mm and fix with double bolts crosswise;
Post-installation Dynamic Inspection
Manually shake the whole assembly to confirm smooth rotation without abnormal friction noise. When matched with composite insulators, mount grading rings and guarantee discharge clearance ≥150mm

Targeted Maintenance Rules for Different Working Environments

Different climate zones require separate inspection and maintenance plans to extend service life：

Coastal high-humidity & salt fog areas Test zinc coating thickness regularly; install rubber sealing gaskets on bolt holes. Complete full inspection every 3 months;

Industrial pollution & acid rain zones Spray extra acid-resistant protective coating on the galvanized surface, reapply the coating every half year;

Frigid frozen soil regions Replace standard bolts with low-temperature alloy bolts;conduct comprehensive hardware inspection before winter comes to prevent cold brittle fracture

Simple Model Selection Guide

Four core factors to confirm before ordering the proper Z clevis：

Rated breaking load

Conventional light-load distribution lines：Z-0780 / Z-1080

Medium heavy-load tension nodes：Z-21100

Heavy-load 110kV & UHV matching points：Z-25110 / Z-32135 / Z-42150

Local environmental conditions For areas with frequent strong winds, our ZS reinforced series is recommended to improve wind vibration resistance;

Hardware compatibility Unify breaking load grade and matching bolt size to avoid assembly mismatch;

Long-term operation plan Form fixed regular inspection schedule according to load and environment after installation

Core Design Standards of Z Series Clevis

All our Z clevis follow four core design rules：

Calculate actual maximum line tension to select matching load level;

Evaluate local climate (salt fog, freezing, industrial pollution) to confirm coating thickness and auxiliary accessories;

Check dimensional matching with existing insulators, bowl heads and bolts;

Arrange periodic inspection and maintenance cycle in advance