As a dedicated grundfos pump mechanical seal manufacturer, MiaoYu Seals produces the rubber cartridge mechanical seals are pre-assembled, drop-in OEM-interchangeable replacements for Grundfos CR, CRN, TP, NB and NK series circulators, multistage boosters and end-suction pumps. Featuring a balanced O-ring pusher design with EPDM or NBR rubber drive elements and a torque-pin locked gland, these grundfos pump mechanical seals eliminate field spring setting errors and cut installation time by up to 60%. The flexible rubber bellows/O-ring stack absorbs minor shaft runout and thermal expansion while maintaining face contact from 0.5 to 10 bar and –10 to 120°C. Carbon graphite rotating face paired with alumina ceramic or tungsten carbide stationary seat—supplied factory-direct from our ISO 9001 workshop at wholesale cost.

As a dedicated rubber bellows seal manufacturer, MiaoYu Seals produces interference-fit, plug-in / Griploc-style OEM-interchangeable Flygt bellow shaft seals for 2000 & 3000 series submersible wastewater pumps (2066, 2102, 3068, 3085, 3102, 3127). Engineered with debris-shedding rubber bellows and bonded alumina/SiC seats, our seals hold leak-free separation between raw sewage and the oil chamber.

As a dedicated face to face mechanical seal manufacturer, our rubber Roten mechanical seals (face-to-face type) are drop-in OEM-interchangeable swaps for Roten Type 2, 2a and 5 configurations—also cross-referenced as AES M37G and N47—fitted on Calpeda, Ebara, Pedrollo and other Italian end-suction water pumps. Built on a symmetric face-to-face design, the rubber mechanical seal uses a single coil spring with friction drive and NBR, EPDM or FKM O-ring secondary sealing on both rotating and stationary sides, eliminating handedness so one assembly fits either rotation direction.

Single spring rubber bellow mechanical seals are unbalanced, inside-mounted elastomer bellow seals designed as drop-in OEM-interchangeable replacements for John Crane Type 1, AES W01/W02, Roten Type 1, MG1 and similar industry-standard configurations. The rubber bellow isolates the spring from the pumped fluid while absorbing shaft runout and axial end-play, and the non-clog coil spring ensures consistent face loading even when debris is present. Precision-lapped carbon graphite faces paired with alumina ceramic or tungsten carbide stationary seats hold leakage below 0.1 ml/h at up to 1.2 MPa and 180°C, covering shaft sizes from 12 mm to 100 mm. Ideal for raw water pumps, sewage lift stations, cooling towers, irrigation and light chemical transfer.

Elastomer rubber bellow mechanical seals for sale are unbalanced, inside-mounted single-spring assemblies designed as drop-in OEM-interchangeable replacements for John Crane Type 1, AES W01/W02, Roten Type 1, MG1 and other industry-standard configurations. Precision-lapped carbon graphite faces paired with alumina ceramic or tungsten carbide stationary seats hold leakage below 0.1 ml/h at up to 1.2 MPa and 180°C, covering shaft sizes from 12 mm to 100 mm. Ideal for raw water pumps, sewage lift stations, cooling towers, irrigation and light chemical transfer—available factory-direct from our ISO 9001 workshop at wholesale cost.

Single and double rubber mechanical seals are modular elastomer bellow assemblies designed as drop-in OEM-interchangeable replacements for John Crane Type 1, AES W01/W02, Roten Type 1, MG1 and similar industry-standard configurations. Precision-lapped faces hold leakage below 0.1 ml/h at up to 1.2 MPa and 180°C, covering shaft sizes from 12 mm to 100 mm.