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HOME  /  PRODUCTS   /  MECHANICAL SEALS  /  SINGLE CARTRIDGE MECHANICAL SEALS  /  MECHANICAL SEAL STYLE  PHB + PHS

Single Stationary
Welded Metal Bellows Cartridge Mechanical Seal with Plain Gland

Mechanical Seal Style PHB

For the most demanding corrosive applications

These two single cartridge seals are engineered for the most demanding corrosive applications. By minimising the number of troublesome O-rings and eliminating any media exposure to the sleeves and glands, we offer two very cost effective solutions to industries’ toughest applications.

PHB.jpg

FEATURES:

  • Stationary welded metal bellows design for better face alignment

  • In highly corrosive conditions that require expensive upgrades to higher alloy metals like duplex stainless steel, Alloy 20, Hastelloy® C276, the PH seals are an ideal economical solution. Only the wetted parts need to be constructed of these alloys while the larger metal parts such as the gland and sleeve can be 316 stainless steel since they are located out of the product

  • The PHB cartridge seal contains only one O-ring which provides substantial cost savings when perfluorelastomers are required

  • Seal faces positioned near the lantern ring connection for enhanced cooling from product recirculation

  • Rotary seal ring is shrouded for protection

  • Short outboard length minimizes nearest obstruction problems

  • Hydraulically balanced design

  • No dynamic O-rings

  • Easy cartridge installation

  • Even face loading

  • Patented (Patent Number US 7,979,986) Plunger-Lock drive

  • Available in inch and metric sizes.

SPECIFICATIONS:

Materials of Construction

  • PHB Welded Metal Bellows: Standard Hastelloy® C276. Other available options include Inconel 718, Titanium, Monel™.

  • Rotating Metal Parts (Wetted) – Hastelloy® C276, other high alloys available

  • Non-wetted metal parts – Gland and sleeve 316 stainless steel

Operating Conditions

Max Temp:  400°F (204°C)

Max Pressure:  300 PSI (20 bar)

Max Speed:  6000 FPM (22 m/sec)

Note: Max Temperature / pressure / speed indicate operating extremes independently and do not imply the seal will function at these extremes at the same time. Contact Specialised Seals if in doubt.

Single Stationary
Multi-Spring Cartridge with Plain Gland

Mechanical Seal Style PHS

PHB.jpg

FEATURES:

  • Stationary multiple spring design for better face alignment

  • In highly corrosive conditions that require expensive upgrades to higher alloy metals like duplex stainless steel, Alloy 20, Hastelloy® C276, the PH seals are an ideal economical solution. Only the wetted parts need to be constructed of these alloys while the larger metal parts gland and sleeve can be 316 stainless steel since they are located out of the product

  • Only single cartridge pusher design with (2) O-rings. Cost savings are substantial when perfluorelastomers are required

  • Seal faces positioned near lantern ring connection for enhanced cooling from product recirculation

  • Rotary seal ring is shrouded for protection

  • Short outboard length minimizes nearest obstruction problems

  • Hydraulically balanced design

  • Easy cartridge installation

  • Hastelloy® C276 springs are located out of the product

  • Available in inch and metric sizes

SPECIFICATIONS:

Materials of Construction

  • PHS Stationary Seal Ring and Inner Flange: Hastelloy® C276 with other high alloys available. Hastelloy® C276 springs standard.

  • Rotating Metal Parts (Wetted) – Hastelloy® C276, other high alloys available

  • Non-wetted metal parts – Gland and sleeve 316 stainless steel

Operating Conditions

Max Temp:  400°F (204°C)

Max Pressure:  300 PSI (20 bar)

Max Speed:  6000 FPM (22 m/sec)

Note: Max Temperature / pressure / speed indicate operating extremes independently and do not imply the seal will function at these extremes at the same time. Contact Specialised Seals if in doubt.

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