Johncrane Seals Type 21

Elastomer bellow mechanical seal SRS-E21, can be replaced of Johncrane 21. Suggested operating limits Temperature: -20 - 120℃ Speed: ≤15m/s Pressure≤1.0Mpa Combined material Rotary face: Carbon/Sic/TC Stat Ring: Ceramic/Sic/TC Seat Type: Standard SRS-S11, Alternative SRS-S20/S21. Features The...

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Product Details

Elastomer bellow mechanical seal SRS-E21, can be replaced of Johncrane 21.


Suggested operating limits

Temperature: -20 - 120℃

Speed: ≤15m/s

Pressure≤1.0Mpa


Combined material 

Rotary face: Carbon/Sic/TC

Stat Ring: Ceramic/Sic/TC

Seat Type: Standard SRS-S11, Alternative SRS-S20/S21.


Features

The drive band's "dent and groove" design eliminates overstressing of the elastomer bellows to prevent bellows slip and protect the shaft and sleeve from wear.

Non-clogging, single-coil spring provides greater dependability than multiple spring designs and will not foul due to fluid contact.

Flexible elastomer bellows automatically compensates for abnormal shaft-end play, run-out, primary ring wear and equipment tolerances.

The Type 21 is ideal for use in centrifugal, rotary and turbine pumps, compressors, chillers and other rotary shaft equipment. It is also commonly used by the waste water and water systems industries for applications such as waste treatment, potable water and HVAC.

Also we could manufacture seals according to your drawing, and design as your request.

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FAQ 

1. Are you a manufacturer, trading company or a third party?

We are a manufacturer, and we have builded up our company since 2010.

2. How can i get to your factory?

Our factory is near shanghai Airport, we can pick you up in the airport. 

3. If i will need to stay in your place for few days, is that possible to book the hotel for me?

It’s always my pleasure, hotel booking service is available.

4. What is your minimum order quantity, can you send me samples?

Our minimum quantity is 1 set, if you need samples, you should pay for proofing. Also we can send you catalog, warmly welcome you to come visit our company. 

5. What is the delivery time of your products?

In general, the delivery time of our products is about 20 days, customized mechanical seal will be delivered as the negotiation with our clients. 

6. Can the products be customized as our need, such as put on our logo?

Surely our products can be customized as your need, Put on your logo is also available. 

7. As the shipping period will take long time, how can you make sure the products won’t be broken?

All mechanical seals are packed separately with shock-proof film to ensure their safety,for heavy items, they will be packed inside plywood,.

8.How can i trust your company?

A:With 8-years-professional design, we can provide you suitable suggestion and lowest price

9.Is your price competitive?

A: Only good quality mechanical seal we supply. Surely we will give you best factory price based on superior product and service.


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