National Standard Seal Series-Product Center-Zigong Nester Mechanical Seals Co., Ltd.

Single-end face

Bogman M7N Series

Anti-abrasion,Anti-clogging,Corrosion-resistant,High-temperature resistant

The Bogman M74D series mechanical seals are specially designed for applications involving particulate-containing, easily crystallizing, and fibrous media. They feature a dual-face, non-balanced design with a multi-spring configuration, making them suitable for medium- and low-pressure environments. Their installation dimensions (excluding the drive housing) comply with DIN 24960 standards, offering high versatility and serving as a high-performance sealing solution for industrial pumps handling complex media.

Bogerman M74D Series

Double-end face

Bogerman M74D Series

Wear-resistant,High-temperature resistant

The Bogman M37G series mechanical seal is a single-face, unbalanced sealing solution characterized by its simple structure, reliable performance, and excellent cost-effectiveness. Specifically designed for medium- and low-pressure, moderately corrosive operating conditions, it is suitable for handling complex media across multiple industries, making it a highly cost-effective alternative to imported seals.

Bogman M37G Series

Single-end face

Bogman M37G Series

High-temperature resistant,Corrosion-resistant,Wear-resistant

Operating parameters: Pressure ≤ 6.0 MPa, temperature resistance: -50℃ to 220℃, linear velocity ≤ 20 m/s; when the shaft diameter is ≤ 100 mm, the axial runout is ±0.5 mm; when the shaft diameter exceeds 100 mm, the axial runout is ±2.0 mm.

Bogman H7N Series

Single-end face

Bogman H7N Series

High-temperature resistant,Wear-resistant,Corrosion-resistant,High-pressure resistant

Operating parameters: Pressure ≤ 2.5 MPa (some specifications reach 4.0 MPa); temperature -50℃ to 220℃; linear velocity ≤ 20 m/s; shaft diameter 14–200 mm; when d1 ≤ 100 mm, the axial runout is ±0.5 mm; when d1 > 100 mm, the axial runout is ±2.0 mm.

Bogman H74D Series

Double-end face

Bogman H74D Series

Corrosion-resistant,High-temperature resistant,Wear-resistant

Operating parameters: Pressure ≤ 1.6 MPa, temperature -20℃ to 120℃, linear velocity ≤ 10 m/s, suitable for conventional medium- and low-pressure operating conditions.

MG1 Series

Single-end face

MG1 Series

High-pressure resistant,Corrosion-resistant,High-temperature resistant

Corrosion- and wear-resistant materials: The friction pair can be configured with either silicon carbide/graphite or tungsten carbide/tungsten carbide combinations; the substrate is made of stainless steel, providing resistance to water, oils, moderately corrosive liquids, organic solvents, and media containing solid particles.

103 Series (for IS pumps)

Single-end face

103 Series (for IS pumps)

Wear-resistant,Corrosion-resistant

The 112 series mechanical seal is a classic single-face, unbalanced sealing solution specifically designed for applications involving clean water, wastewater, and moderately corrosive media. With its compact structure and stable performance, it is well-suited for equipment such as multistage pumps and represents a cost-effective sealing option for industrial and chemical pumps.

112 Series

Single-end face

112 Series

High-temperature resistant,Wear-resistant

The 224 series mechanical seals feature a dual-face, multi-spring, non-balanced design, specifically engineered for applications involving corrosive media such as in the chemical and water treatment industries. These seals offer reliable sealing performance and high safety, making them the preferred sealing solution for complex medium- and low-pressure operating conditions.

224 Series

Double-end face

224 Series

High-temperature resistant,Wear-resistant,Corrosion-resistant

The BIA series mechanical seals represent a classic single-face, unbalanced sealing design specifically engineered for applications involving clean water, wastewater, and moderately corrosive media. With their compact structure and stable performance, these seals are well-suited for industrial pumps across a wide range of industries, making them a cost-effective sealing solution.

BIA Series

Single-end face

BIA Series

Wear-resistant,High-temperature resistant