FEATURES 1. QHH108U type mechanical seal complies with ISO3069, standard DIN24960, GB/T6556 standards. 2. Single seal 3. Inside seal 4. Unbalanced seal 5. Single spring 6. Rubber o-rings or PTFE ring as auxiliary seal ring. 7. Fixed shaft rotation direction for single spring (hook) drive Advantages 1. Standard mechanical seal with ideal sealing 2. Axial loaded O-ring dynamically, easy and smooth, damage free 3. Long Product Lifecycle. Energy saving and environment protection 4. Clean assembly. Installation faults were avoided, damage-free and cost-effective. 5. Straightforward and easier specification for pre-assembled units. Time saving (reduced down-times) 6. Transmission, in combination of circular groove drive and fork transmission 7. Single spring: greater performance, safer than multiple springs 8. Customized products (OEMs) are available. 9. Wide applicable to programs about conversion and retrofit Conditions and Operating range 1. Pressure: 0.1-0.6MPa 2. Temperature: -20° C~ 80° C 3. Shaft diameter: d=35 to 70mm 4. Rotation speed: n≤3000r/min 5. Applicable medium: Clean water, waste, oil and weak corrosive fluid (medium) Materials Metal parts: Metal 316, 304, 2Cr13 Single Spring Friction Elements: Silicon carbide or hard alloy, graphite Auxiliary seal: Rubber O-ring or PTFE