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MECHANICAL SEALS

Nippon Pillar has provided various types of mechanical seals with secure high gas-tightness
since 1951 when the Company first developed a mechanical seal to prevent the leakage of hazardous fluids. These mechanical seals are applied in a wide range of industries, including petroleum refining, chemical, paper milling, steelmaking, water supply and sewerage, food processing and ship building. Nippon Pillar's mechanical seals are fully compliant with API STANDARD 682 and ISO standards and deliver a stable performance even under the harshest operating conditions.

OIL & GAS

Type AAB Rotating multi-spring seal
Features & Benefits
The mechanical seal of this type is a typical balance seal of Pillar seals, used for any industries since olden times. It uses the standardized rotating seal to be compatible to the dimension, construction and application of equipment used, and used mulli-spring to demonstrate the stabilized performance in a wide range of application.This model is categorized in API682. Seal type A
Performance
Pressure: 4.2MPa (610psi), Velocity: 20m/s, Nom.size: q,20-250
Application: Process pump, Mixer, Blower
SiC (Tungsten Carboide) vs Carbon & Flouro Elastomer, 316 SS

Type WQR Rotating welded metal bellows Seal
Features & Benefits
The bellows pack is a rotary type metal bellows seal that can be also attached to the pump compatible to ISO or OIN, and can provide the effect for countermeasure against operation
failure of shaft packing type. Since the inconel is used for bellows material, it can be applicable to a wide of fluid.This model is categorized in API682. Seal type B
Performance
Pressure: 2.0MPa (290psi), Velocity: 25m/s, Nom.size: q,20-100
Application: Utility pump, Middle pressure pump
SiC vs Carbon & Flouro Elastomer. 316 SS

Type QBS Welded metal bellows Seal
Features & Benefits
The mechanical seal of this type is a stationary type seal, using a double bellows of welded metal without no shaft packing, which provides the excellent resistance against pressure Since it provides the excellent follow-up performance and does not require any consideration for heat resistance limit of packing material, it is suitable to high-temperature use.This model is categorized in AP1682. Seal type C
Performance
Pressure: 3.0MPa (435psl), Velocity: 60m/s, Nom.size: q,23-180
Application: High temperature liquid
SiC vs Carbon, 316 SS

Type RRG.PPG Dry contact seal I dry gas seal
Features & Benefits
These mechanical seal is used in tandem seal as containment seal.
RRG:This is a dry contact seal. The seal ring is grooved for reduction of load and is impregnated with special lubricant, it can assure the stable sealing performance for a long time.
PPG:This is a dry gas seal. The seal surface of rotating ring is uniquely grooved, to use the hydro dynamic pressure effectively by the multi-independent grooves.These arrangement are 2CW-CS in API682.
Performance
Pressure: 0.1MPa (14.5psi), Velocity: 20m/s, Nom.size: q,20-130
Application: Process pump
SiC vs. Premium Carbon & Fluoro Elastomer, 316 SS

Type Phoenix Seal @ Non-Contact dry gas seal
Features & Benefits
Bi-directional type non-contact dry gas seal.
Multi-independent hydrodynamic pressure distribution generated by multiindependent grooves gives more stable seal performance.
(US 5664748, 5529318 EU Pending)
Performance
Pressure: 10MPa (1450psi), Velocity: 150m/s, Nom.size: .p50-200
Application: Turbine, Blower, Compressor
Carbon vs Sic & Fluoro Elastomer, 316 SS

API 682 PIPING PLAN  
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