FEATURES 1. QH1523 type mechanical seal complies with ISO3069 standard, DIN24960, GB/T6556 standards. 2. Single seal 3. Inside seal 4. balanced seal 5. Single spring 6. Parallel-circle spring drive 7. Rubber o-rings as auxiliary seal ring 8. Fixed shaft rotation direction for parallel circle spring drive Advantages 1. Standard mechanical seal with ideal sealing 2. High pressure operating conditions are agreeable. 3. Excellent compensation performance, functioning equivalent, effective pressurization 4. Single Spring: greater performance, safer than multiple springs 5. Sliding secondary seal, DOES NOT meet with fluid. 6. Long product lifecycle. Energy saving, environment protection. 7. Clean assembly 8. Installation faults are avoided, damage-free and cost-effective. 9. Individual adaptation is subject to pump's design and style. Customized products (OEMs) are available. Conditions and Operating range 1. Pressure: 0.1-2.0MPa 2. Temperature: -50° C~ 200° C 3. Shaft diameter: d0=30 to 100mm. d=35 to 105mm 4. Rotation speed: n≤3000r/min 5. Applicable medium: Water, waste, oil and weak corrosive fluid (medium) Materials Metal parts: Metal 316, 304, 2Cr13 Parallel-circle Spring Friction Elements: Silicon carbide or hard alloy, Carbon graphite Auxiliary seal: Rubber O-ring or PTFE Seat Types: W, N