MT21D John Crane Type 521

MINKIX Code:
MT21D
Equivalent to:

Johncrane Type 21, AES P03, Vulcan 24, Burgmann MG912, Sealol 43DIN
INTRODUCTION OF THIS MECHANICAL SEAL

MT21D standard seal is a general purpose seal, has become an industry standard with OEM Designers.
This versatile seal can be used on a wide range of equipment such as centrifugal, rotary and turbine pumps
as well as compressors, mixer, blenders, chillers, agitators, and other rotary shaft equipment.

MT21D is ideal for pupl and paper, pool/spa, water, food processing,
wasterwater treatment , and other general applications.

Quality Material
Low Leakage Rate
Fast Quotation
In-stock Supply
Lightening Delivery
Reliable After-Sales

Product Drawing

Product Information

Design Features

Self- aligning, automatically adjusts for shaft end pay and run-out

Mechanical drive protexts the rubber bellows

Single coil spring improves tolerance to clogging

Simple to fit and repairable in field

Can be used with practically any type of mating ring

Materials available

Seal face: carbon, ceramic, TC, SIC

Elastomer: nitrile, viton, EPDM

Standard seat

Cup mounted seat

Operating Conditions

Temperature: -40°C to +205°C

Pressure: Up to 11 bar , 150 psi

Speed: Up to 13m/s, 2500fpm

Depending on medium, size and material

Product Dimensions & Information

Imperial Dimension

D (mm)

16	27.0	26.5	25.7	10.3	36.0
18	33.0	30.5	27.2	10.3	37.5
20	35.0	34.5	27.2	10.3	37.5
22	37.0	40.0	27.2	11.0	38.2
24	39.0	40.0	29.0	11.0	40.0
25	40.0	40.2	29.0	11.0	40.0
28	43.0	47.0	31.5	11.0	42.5
30	45.0	47.0	31.5	11.0	42.5
32	48.0	50.5	31.5	11.0	42.5
33	48.0	51.5	31.5	11.0	42.5
35	50.0	55.0	31.5	11.0	42.5
38	56.0	58.0	34.0	11.0	45.0
40	58.0	61.5	32.3	12.7	45.0
43	61.0	61.5	32.3	12.7	45.0
45	63.0	61.5	32.3	12.7	45.0
48	66.0	65.5	32.3	12.7	45.0
50	70.0	70.0	34.8	12.7	47.5
53	73.0	74.0	33.3	14.3	47.6
55	75.0	76.0	33.3	14.3	47.6
58	78.0	79.0	38.3	14.3	52.6
60	80.0	82.0	38.3	14.3	52.6
63	83.0	86.0	38.3	14.3	52.6
65	85.0	87.0	36.0	16.0	52.0
68	90.0	91.5	36.0	16.0	52.0
70	92.0	93.0	44.0	16.0	60.0
73	93.0	99.0	44.0	16.0	60.0
75	97.0	99.0	44.0	16.0	60.0

MINKIX Material Code

The MINKIX Material Code is comprised of 5 character code such as "BCFZF" which is defined by the following parameters. Check the material code below to specify your requirement on materials. With the detailed code provided, MINKIX promises to speed up offering quotation to you.

Rotary Materials
- A – Resin-Car
- B – 99.5% Ceramic
- C – Anti-Car
- Q – Sintered-sic
- S – RB-SIC
- T– YN6 TC
- I – High Nickel Cast Iron
- Z – Bronze
- D – 304 Stainless Steel
- G – 316 Stainless Steel
Stationary Materials
- A – Resin-Car
- B – 99.5% Ceramic
- C – Anti-Car
- Q – Sintered-sic
- S – RB-SIC
- T– YN6 TC
- I – High Nickel Cast Iron
- Z – Bronze
- D – 304 Stainless Steel
- G – 316 Stainless Steel
Secondary Seal Materials
- K – KALREZ
- X – AFLAS
- E – EPDM
- F – PTFE
- M – SILICONE
- N – NITRILE
- P – NEOPRENE
- V – FKM
Spring Materials
- D – 304 Stainless Steel
- G – 316 Stainless Steel
- D2 – 304L Stainless Steel
- G2 – 316L Stainless Steel
- H – Hastelloy
Construction Materials
- D – 304 Stainless Steel
- G – 316 Stainless Steel
- D2 – 304L Stainless Steel
- G2 – 316L Stainless Steel
- H – Hastelloy

Combine

Send Your Enquiry

Having no Idea About Materials?

Feel free to contact MINKIX's experts. We can offer professional advice with working environment information provided.

Contact MINKIX

Types of Mechanical Seals We Offer

MT21 John Crane Type 21

Johncrane Type 21, AES P04, Burgmann MG921, Sealol 43CU short, Vulcan 11