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Plan 11 (Flush from Discharge)

Inboard
Plan 11 is the most common flush plan in use today. This plan takes fluid from the pump discharge (or from an intermediate stage) through an orifice(s) and directs it to the seal chamber to provide cooling and lubrication to the seal faces.
Plan 11

Why do we use it?

  • When the seal heat requires a continuous flush flow to cool the seal
  • When the process fluid is free from abrasives
  • When the process fluid is far enough away from the vapour pressure limit and seal temperature limits for good seal operation

Advantages:

No product contamination and piping is simple.

General:

If the seal is set up with a distributed or extended flush, the effectiveness of the system will be improved.

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Seals applicable to this plan

Type 2874HTC

Non-contacting, Metal Bellows, Outward Pumping Dual Pressurized Gas Lubricated Seal

Type 2874HTC

Reliably sealing high and low temperature process fluids up to 425°C (800°F), the Type 2874HTC incorporates unique HTC (high-temperature, corrosion-resistant) metal bellows technology with non-contacting…

Type 1604

Single Stationary API 682 Metal Bellows Cartridge Seal Type C, Arrangement 1

Type 1604

The Type 1604 high-temperature, high-performance Type C, Arrangement 1, API 682 qualified cartridge seal is designed for high-temperature applications such...

Type 1604HTC

Single Stationary Welded Metal Bellows API 682 Cartridge Seal Type C, Arrangement 1

Type 1604HTC

The Type 1604HTC is an API 682 qualified single stationary bellows cartridge seal Type C, Arrangement 1. The Type...

Type 1670

API 682 Category II and Category III, Type B, Arrangement 1 Single Rotating Metal Bellows Cartridge Seal

Type 1670

The Type 1670 is a factory pre-set edge-welded metal bellows API 682 qualified cartridge seal with Alloy C-276 (UNS N10276)...

Type 2609HTC/3609HTC Metal Bellows Cartridge Seal

Dependable API 682 Cartridge Seals

Type 3609HTC dual scroll

The Type 2609HTC and Type 3609HTC are dependable API 682 cartridge seals that utilize two impressive design innovations by...

Type 2609HTL/3609HTL Metal Bellows Seal

Dual Unpressurized and Pressurized Rotating Bellows Cartridge Seals (API 682 Type C, Arrangement 2 and 3)

Type 2609HTL/3609HTL

Type 2609HTL is a dual unpressurized rotating bellows cartridge seal API 682 Type C, Arrangement 2. Type 3609HTL is a...

Type 3604/3604HTC/3604HTCDP

API 682 Type C, Arrangement 3, Stationary Metal Bellows Cartridge Seal

Type 3604 dual scroll

The Type 3604/3604HTC/3604HTCDP is a highly reliable dual face-to-face stationary cartridge seal for high-temperature refinery services that is fully API...

Type 5625P-1

Universal Cartridge Seal Family — API 682 Qualified Dual Cartridge Unpressurized/Pressurized Metal Bellows Seal

High-performance, low-emission, non-pusher seals, the Universal Cartridge 5600-1 Series is a modular cartridge seal family that includes interchangeable metal bellows...

Type 2874

Non-contacting Dual Gas Seal Cartridge for Pumps

Type 2874

The Type 2874 is an internally pressurized, gas-lubricated, non-contacting dual cartridge seal designed for use in API, ANSI and DIN...

Type 1648 O-Ring Pusher Seal

API 682-qualified, Single Cartridge, Type "A" O-ring Pusher Seal

Type 1648

The Type 1648 is a high-performance single cartridge pusher seal designed to help prevent emissions leakage in most refinery applications....

Type 2648 O-Ring Pusher Seal

API 682-qualified, Dual Unpressurized Cartridge, Type "A" O-ring Pusher Seal

Type 2648

The Type 2648 is a high-performance, low-emission cartridge seal designed to provide additional safety for hazardous applications and applications where...

Type 3648

API 682-qualified, Dual Pressurized Cartridge, Type "A" O-ring Pusher Seal

Type 3648

The Type 3648 is a high-performance, low-emission cartridge seal designed for maximum containment of hazardous fluids and light hydrocarbons. Its...

Type 2800MB Welded Metal Bellows Seal

Welded Metal Bellows Gas-lubricated, Non-contacting, Dual Cartridge Seal with Elastomeric Secondary Seals

Type 2800MB

The Type 2800MB is a state-of-the-art welded metal bellows, gas-lubricated, non-contacting seal for achieving 0.0 fugitive emissions for Maximum...

Type 5610/5610Q/5610L O-Ring Pusher

Universal Cartridge Seal Family — Single Cartridge O-Ring Seal

Type 5610

The first truly universal cartridge seal, the Type 5610 will change your approach to sealing. Since the 5600 Series components...

Type 5610V/VQ/VP O-Ring Pusher

Universal Cartridge Ear Drive O-Ring Seal Head

Type 5610V/VQ/VP

The specially engineered, fully interchangeable ear drive O-ring seal head extends the functionality of the 5600 series product line for standard ANSI and large bore…

Type 5620/5620P/5620VP O-Ring Pusher Seals

Universal Cartridge Seal Family — Dual Cartridge O-ring Seal

Type 5620

The first truly universal cartridge seal, the Type 5620/5620P/5620VP will change your approach to sealing. Since the 5600 Series components...

Type 5615/5615Q/5615L

Universal Cartridge Seal Family — Single Cartridge Metal Bellows Seal.

Type 5615

The 5600 Series is the first truly universal cartridge seal — and the modular family concept of John Crane's Universal Cartridge will change your approach…

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