This Type 301 rubber bellows mechanical seal is a direct-dimension replacement designed for legacy APV® end-suction centrifugal water pumps — including certain Premier series models and early World Series utility pump variants that utilize a bellows-type seal chamber. Unlike modern wave-spring hygienic cartridge seals (APV W+ type), this type 301 mechanical seal features a one-piece nitrile (NBR) or EPDM rubber bellows rotating assembly that combines the secondary seal, drive mechanism, and spring function into a single component.

The flexible bellows design compensates for shaft run-out, vibration, and minor misalignment common in aging pump installations — eliminating the need for set screws or drive pins that can slip on worn shafts. The standard face combination of resin-impregnated carbon graphite rotating against a 99.5% alumina ceramic stationary seat provides reliable sealing for clean water, softened water, cooling water, and light mineral oils at temperatures up to 100°C (NBR) or 120°C (EPDM).

Available in common fractional-inch shaft diameters from 3/8″ to 1″ (9.5–25.4 mm), this type 301 mechanical seal is a cost-effective, drop-in replacement for maintaining legacy APV pump installations without expensive conversion to modern cartridge seal chambers.

A wave spring mechanical seal engineered as a direct OEM replacement for SPX APV centrifugal pumps, available in mechanical seal 40mm and mechanical seal 45mm shaft diameters to fit W, W+, and PUMA series. The open sinusoidal wave spring design resists product entrapment during CIP/SIP cycles, making this APV pump mechanical seal ideal for dairy, beverage, pharmaceutical, and food processing lines. With balanced face loading, compact axial length, and optional SiC/SiC or Carbon/SiC face combinations, our wave spring seals deliver hygienic, leak-free performance in viscous or particulate-laden fluids.

The silicon carbide stationary mechanical seal is a precision-engineered sealing solution designed specifically for the demanding requirements of sanitary, high-purity, and chemically aggressive applications in industries such as food and beverage, pharmaceuticals, biotechnology, and chemical processing. APV pumps, known for their hygienic design and reliability in handling sensitive fluids, benefit from this silicon carbide mechanical seal's exceptional material properties and performance characteristics.

This Burgmann M3N mechanical seal is a precision-engineered Burgmann mechanical seal replacement covering the entire M3 series, including Burgmann M32 and Burgmann M37N variants. As a direct drop-in for EagleBurgmann M3N, M32, and M37N seals, this Burgmann mechanical seal features a simple conical spring design that is self-cleaning and robust—ideal for water, oil, and mild chemical services. The Burgmann M3N variant uses a single spring to grip the shaft, eliminating drive pins that can slip. The Burgmann M32 and Burgmann M37N share the same proven geometry with slight dimensional variations. Available in shaft sizes 6mm to 80mm with Carbon, SiC, or TC faces and NBR, EPDM, or Viton elastomers. Factory-direct pricing on all Burgmann mechanical seal replacements.

Looking for a Burgmann M32/55 mechanical seal or a direct EagleBurgmann M32/55 replacement? Our MIAOYU M3255 series is a 100% dimensionally interchangeable equivalent to the original EagleBurgmann M3 series (M3N/M32/M37N, including the M32/55 compact version). Designed for water pumps, sewage pumps and light industrial centrifugal pumps, this Burgmann type M32 mechanical seal replacement delivers OEM-grade performance at a fraction of the cost. As a Burgmann M32/55 replacement manufacturer in China, we offer custom mechanical seal factory direct price, OEM/ODM support and full material options.

Looking for a Burgmann H75N mechanical seal or a direct EagleBurgmann H75N replacement? Our MIAOYU H75N series is a 100% dimensionally interchangeable equivalent to the original EagleBurgmann H75N balanced mechanical seal for tandem pump, high-pressure multistage centrifugal pumps and process pumps. As a Burgmann H75N replacement manufacturer in China, we offer custom mechanical seal factory direct price, OEM/ODM support and full material options—delivering OEM-grade performance without the OEM markup. Suitable for oil, water, weak corrosive media up to 25 bar.

The Burgmann M2N single mechanical seal is the industry standard for submersible pumps. Its robust, unbalanced design and conical spring ensure reliable operation in dirty water and sewage. Our high-quality burgmann mechanical seal replacement offers a perfect fit for your submersible pump mechanical seal needs.

The Burgmann HJ92N is a robust, single‑face, balanced Burgmann mechanical seal designed specifically for vertical turbine pump applications. It features a wave‑spring, O‑ring pusher design that is independent of rotation direction and fully isolated from the pumped fluid. Engineered to handle high‑pressure spikes, abrasive solids, and viscous media, the Burgmann HJ92N delivers reliable, leak‑free performance in demanding industrial environments.

The Burgmann M7N mechanical seal is a robust, single‑face, unbalanced Burgmann mechanical seal designed for a wide range of pump applications. It features a wave‑spring, O‑ring pusher design that is independent of rotation direction and fully isolated from the pumped fluid. Engineered to handle high‑pressure spikes, abrasive solids, and viscous media, the burgmann m7n mechanical seal delivers reliable, leak‑free performance in demanding industrial environments.

As a dedicated eagleburgmann mechanical seal manufacturer, MiaoYu Seals produces dry gas mechanical seals designed as direct replacements for EagleBurgmann seals in monoblock pumps. Engineered for reliability and efficiency, our eagleburgmann dry gas seals ensure zero leakage, reduced energy consumption, and extended equipment lifespan in demanding industrial applications.

The Burgmann MG12 mechanical seal is a robust, single-spring elastomer bellows seal designed for general-purpose industrial applications. As a direct replacement for the EagleBurgmann MG12 series, this seal features a unique extended bellows tail that ensures the fitting length complies with the EN 12756 standard when paired with a G6 or G60 seat.

The Burgmann MG1 mechanical seal represents the industry standard for elastomer bellows seals, designed for reliable performance in various industrial pumping applications. This face mechanical seal is engineered to maintain integrity even in challenging conditions where a consistent liquid film may be absent. Serving as a direct replacement for the original Burgmann MG1 mechanical seal, it utilizes a robust, flexible bellows to provide excellent sealing, making it the optimal choice for standard centrifugal pumps, mixers, and agitators where durability and cost-effectiveness are paramount.

The flowserve pusher mechanical seal is a robust and versatile sealing solution engineered to deliver reliable performance in demanding fluid handling applications. This design represents a high-quality Flowserve mechanical seal alternative, specifically built as a direct, interchangeable replacement for original Flowserve components. 

Model NO.: Type 21

Specification: 1'',1 1/4'',1 3/8'',1 5/8'',1 3/4'',1 7/8'',2 1/8'

Temperature: high temperature mechanical seal

Balance: Unbalanced

Type: Multi-Spring

Accreditation: ISO, SGS, UL, ROHS

Service: OEM/ODM

Origin: China

The flowserve double mechanical seal is a high-performance safety and containment solution engineered for critical pumps handling volatile hydrocarbons. This configuration, offered as a reliable Flowserve double mechanical seal alternative, consists of two sets of sealing faces arranged in series with a barrier fluid between them. It is designed specifically as a robust hydrocarbon pump mechanical seal to prevent hazardous fluid emissions, meet stringent environmental regulations, and ensure operational safety. 

The flowserve ISC2 mechanical seal is a purpose-built, high-reliability sealing solution designed specifically for heavy-duty pool and aquatic center pump applications. Engineered as a direct-fit alternative, this flowserve ISC2 Seal offers superior performance where conventional seals may fail. As a robust flowserve pump seal, its stationary cartridge design simplifies installation and maintenance, eliminating the need for complex shaft measurements. The key advantage of this stationary mechanical seal is its exceptional resistance to chlorine, bromine, and other aggressive pool chemicals, which are common causes of elastomer degradation. It is the ideal pool pump mechanical seal for large split-case and end-suction pumps, providing long service life, minimal leakage, and reliable operation in both commercial and high-capacity residential pool systems.

The flowserve cartridge seal for boiler feed water pump is a pre assembled, high performance sealing solution engineered to withstand the extreme conditions of boiler feed systems. This durable flowserve cartridge seal is specifically designed to handle high-pressure, high-temperature feed water, ensuring reliable containment and pump integrity. As a critical boiler feed water pump mechanical seal, it features robust materials (such as silicon carbide or tungsten carbide faces) and a balanced design to minimize heat generation and face wear, extending service life and reducing maintenance frequency. The cartridge configuration allows for quick, error-free installation, making it a direct, drop-in replacement for OEM flowserve cartridge seals in demanding power generation and industrial steam applications.

The Flowserve replace pump shaft seal is a high-performance mechanical sealing solution specifically engineered for the rigorous demands of hydrocarbon processing. This product is manufactured as a precise, direct-fit mechanical seal replacement for original Flowserve components, ensuring seamless interchangeability and minimizing downtime. Designed as a robust hydrocarbon pump mechanical seal, it incorporates specialized materials such as chemically resistant elastomers (e.g., FKM/Viton) and advanced seal faces (like silicon carbide) to withstand the corrosive and volatile nature of light oils, solvents, and fuels. The seal is built to handle the specific challenges of hydrocarbon services, including temperature fluctuations and the risk of emissions, providing reliable containment. This flowserve mechanical seal alternative offers a durable and cost-effective solution for critical pumps, making it an essential component for safe and efficient operations in refineries, petrochemical plants, and other demanding industrial environments.

The flowserve pac seal type 21 O-Ring Mechanical Seal is an industry-standard, general-purpose component seal designed for reliable performance in a wide range of light to moderate-duty applications. This versatile seal features a unique hexagonal drive band that mechanically locks the spring and seal face, ensuring positive torque transmission without slippage—even in higher viscosity fluids like oils and coolants. It is engineered as a direct, drop-in replacement for original Flowserve Pac-Seal Type 21 units, offering full interchangeability with standard dimensions and configurations.