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NINGBO MIAOYU MACHINERY TECHNOLOGY CO., LTDNINGBO MIAOYU MACHINERY TECHNOLOGY CO., LTD

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Alfa laval replacement
APV pump replacement
Burgmann replacement
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Flygt pump seal replacement
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Roten replacement
AES replacement
Premium John Crane interchange seals with stable sealing and long service life.
img of Crane Type 1 PTFE Wedge Dual Mechanical Seal

Crane Type 1 PTFE Wedge Dual Mechanical Seal

• Self-Aligning: The Type 1's full-convolution design (modified for wedge) retains excellent self-alignment capabilities, handling shaft deflection better than standard wedge seals.

• Custom Gland: Supplied with a custom-machined gland plate to house the dual seal assembly within standard pump dimensions.

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img of Crane Type 2 Single Spring Elastomer Bellows Seal

Crane Type 2 Single Spring Elastomer Bellows Seal

• Proven Geometry: Leverages the decades of reliability of the Type 1 design but compacted for tight spaces.

• Self-Aligning: The flexible bellow accommodates shaft runout.

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img of John Crane O-Ring Pusher Mechanical Seals

John Crane O-Ring Pusher Mechanical Seals

• Compact Design: Multi-spring versions fit into very short stuffing boxes.

• High Pressure: O-ring pushers are generally capable of higher pressures than bellow seals.

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img of John Crane 58B 58U 59B 59U Mechanical Seal Replacement

John Crane 58B 58U 59B 59U Mechanical Seal Replacement

• Multi-Spring Design: Uses multiple small springs located outside the fluid path (in some configurations) or protected to provide uniform face loading without clogging.

• Shaft Protection: The seal design does not fret the shaft, as the dynamic secondary seal moves against a hardened sleeve or the seal's own components depending on the specific sub-model.

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img of John Crane Type 1 O-Ring Pusher Mechanical Seals Replacement

John Crane Type 1 O-Ring Pusher Mechanical Seals Replacement

• Robust Drive: The large single coil spring grips the shaft for positive drive, but the sealing is handled by a precision O-ring, offering a hybrid of robustness and high-pressure capability.

• Non-Clogging: The large spring resists fouling.

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img of John Crane 8B1 8B2 Mechanical Seal Replacement

John Crane 8B1 8B2 Mechanical Seal Replacement

• Anti-Extrusion Tech: Equipped with precision backup rings to prevent O-ring extrusion under extreme pressure spikes.

• Heavy Duty Drive: Utilizes substantial drive keys to transmit the high torque required to rotate the faces in high-viscosity or high-pressure fluids.

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img of John Crane Type 21 Mechanical Seal for Reactor

John Crane Type 21 Mechanical Seal for Reactor

• Dry-Run Faces (Optional): Can be fitted with specialized dry-running Carbon faces for gas-phase reactions where liquid lubrication is prohibited.

• Non-Metallic Options: For glass-lined reactors, we offer ceramic-coated or PTFE-sleeved metal parts to prevent metal contamination.

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img of John Crane PTFE Wedge Mechanical Seal

John Crane PTFE Wedge Mechanical Seal

• Low Profile: Designed to fit into the extremely short axial space typical of "Type 6" cavities while offering "Type 9" performance.

• Positive Drive: Uses a pinned drive system to ensure face rotation without relying on friction from the wedge.

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img of John Crane 4610 5610 Mechanical Seal for Oil Pump

John Crane 4610 5610 Mechanical Seal for Oil Pump

• Reversible Faces: Some models feature reversible seal faces, effectively doubling the life of the wearing components (check specific model).

• A-Drive System: Utilizes a robust drive mechanism that distributes torque evenly, preventing face distortion.

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img of John Crane RM 2100 Elastomer Bellows Shaft Seal

John Crane RM 2100 Elastomer Bellows Shaft Seal

• No Drive Pin Needed: The bellow strength allows it to drive the face directly, simplifying the design and protecting the shaft.

• Non-Clogging: The large single spring resists fouling in wastewater applications.

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img of John Crane Type 8 Type 9 Mechanical Seals

John Crane Type 8 Type 9 Mechanical Seals

• Precision Wedge: Our Type 9 replacement features a CNC-machined PTFE wedge with optimized angles for reduced friction and better sealing reliability.

• Balanced Options: Available in Type 8B1/9B versions for high-pressure applications (balanced step).

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img of John Crane Pump Seals Replace for Multistage Pump

John Crane Pump Seals Replace for Multistage Pump

• Stepped Shaft Requirement: Designed to fit stepped shafts to achieve hydraulic balance, reducing heat generation and face wear.

• Anti-Extrusion: Features tight-tolerance backup rings to prevent the PTFE wedge from extruding under high pressure.

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img of John Crane Double Cartridge Mechanical Seal

John Crane Double Cartridge Mechanical Seal

Type: Double cartridge mechanical seal

Replace Brand: John Crane mechanical seal

Specification:  type 6/type 8/type 9/type 21/109b/2100/5610/8b1/8b2

Temperature: high temperature mechanical seal

Balance: Unbalanced

Type: Multi-Spring

Accreditation: ISO, SGS, UL, ROHS

Service: OEM/ODM

Origin: China

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img of John Crane Dry Gas Seal Replacement

John Crane Dry Gas Seal Replacement

• Lift-Off Technology: Laser-etched grooves create aerodynamic lift, separating the faces at low speeds.

• Clean Operation: Eliminates the need for messy oil barrier systems, ideal for high-purity pharmaceutical or semiconductor applications.

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img of John Crane PTFE Mechanical Oil Seal

John Crane PTFE Mechanical Oil Seal

• Low Friction PTFE: Reduces power consumption and heat generation.

• Composite Design: Uses a PTFE sealing lip or wedge integrated into the compact Type 6 metal shell.

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img of John Crane Elastomer Bellows Seals Kits

John Crane Elastomer Bellows Seals Kits

• Flexible Bellow: Compensates for significant shaft end-play and misalignment.

• Friction Drive: The bellow grips the shaft to drive the face, requiring no set screws.

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Get Started With Your Next Project.
If you have any questions about our products and services, please feel free to contact us. Our team will get in touch with you within 24 hours!
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    Our company is specialized in the production of sealing materials, mechanical seals , cartridge seals.

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    Tell us your sealing requirements (working conditions, media, dimensions, etc.), and our engineers will provide a tailored solution and quote within 24 hours. Your inquiry is 100% confidential.
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