FEATURES 1. QHDBm-B-1 (imperial) type is metal bellows mechanical seal. 2. Balanced Single seal 3. Single-layer metal bellows structure 4. Auxiliary seal is flexible graphite and a flexible graphite reinforced gasket. 5. The mechanical seal comprises of rotary mechanical seal and stationary mechanical seal. The performances are completely interchangeable, when having all parts exchanged . In addition, an uncompensated ring has two structural types, namely an embedded type and an integral type, adding alternative choices for the user. The QHDTM and QHDBM-A/B-1 can be interchanged all the whole. Advantages 1. Normal mechanical seals for ideal sealing 2. High pressure operating conditions are agreeable. 3. Integrated seal faces, strong deformation resistance 4. Clean assembly 5. Long product lifecycle. Energy saving, environment protection 6. Installation faults are avoided, damage-free and cost-effective. 7. Excellent compensation performance functioning equivalent, effective pressurization 8. Straightforward and easier specification for pre-assembled unit. Time saving (reduced down-times) 9. Individual adaptation was subject to pump's design and style. Customized products (OEMs) are available. 10. Wide applicable to program about conversion and retrofit Conditions and Operating range 1. Pressure: 0~2MPa 2. Temperature: 200° C~315° C 3. Shaft diameter: d=27 to 95 mm, d0=30 to 100mm 4. Rotation speed: n≤3000r/min 5. Applicable medium: Materials Metal parts: 316, 304, 2Cr13 Friction Elements: Silicon carbide or hard alloy.