John Crane Type 21 Mechanial Seal

• Customization: Available
• Standard: Standard, Nonstandard
• Transport Package: Wooden Box or Carton Box Upon The Order
• Model NO.: SS-Type 21
• Specification: CE; RoHS
• Trademark: Saisi Seal
• Origin: Zhangjiagang, Jiangsu
• Production Capacity: 50, 000sets/Year

Product Description

SS-Type 21

Structure Description:

Rubber bellows design

Equivalent to John crane type 21/AES P04/AES P04T

 

 

Operating Limits:

 

Temperature:-40°F to 400°F/-40°C to 205°C (depending on materials used)

Speed: 13m/s

Pressure: 11bar

Standard size: 0.275-1''

 

 

Material:

 

Seal ring: Car,Sic,Ssic,Ceramic,TC

Secondary seal: NBR,EPDM,Viton etc.

Spring and metal parts:304,316,HAST.C

 

 

 

SS-Type 21
Size(Inch)	D1	D3	D4	L3
0.250	0.250	0.718	0.843	0.625
0.375	0.375	0.812	0.937	0.812
0.500	0.500	0.937	1.187	0.812
0.625	0.625	1.062	1.187	0.875
0.750	0.750	1.187	1.312	0.875
0.875	0.875	1.312	1.437	0.937
1.000	1.000	1.687	1.937	1.000
1.125	1.125	1.812	2.062	1.062
1.250	1.250	1.937	2.187	1.062
1.375	1.375	2.062	2.312	1.125
1.500	1.500	2.187	2.437	1.125
1.625	1.625	2.500	2.750	1.375
1.750	1.750	2.625	2.875	1.375
1.875	1.875	2.750	3.000	1.500
2.000	2.000	2.875	3.187	1.500
2.125	2.125	3.000	3.312	1.687
2.250	2.250	3.125	3.437	1.687
2.375	2.375	3.250	3.562	1.812
2.500	2.500	3.343	3.687	1.812
2.625	2.625	3.500	4.000	1.937
2.750	2.750	3.750	4.125	1.937
2.875	2.875	3.875	4.375	2.062
3.000	3.000	4.000	4.500	2.062
3.125	3.125	4.125	4.750	2.187
3.250	3.250	4.250	4.875	2.187
3.375	3.375	4.500	5.250	2.187
3.500	3.500	4.625	5.375	2.187
3.625	3.625	4.750	5.500	2.312
3.750	3.750	4.875	5.625	2.312
3.875	3.875	5.000	5.750	2.437
4.000	4.000	5.125	5.875	2.437