Pool Pump Seal John Crane Type 21 Mechanical Seal

• Customization: Available
• Structure: Single End
• Pressure: ≤1.0MPa
• Model NO.: SRS-E21
• Speed: ≤15m/S
• Temperature: -20ºC~120ºC
• Performance: Temperature
• Standard: Standard
• Type: SRS-01
• Balance: Balanced
• Replace: Johncrane 21
• Rotary Face: Carbon/Sic/Tc
• Stat Ring: Carbon/Sic/Tc
• Seat Type: Standard SRS-S11, Alternative SRS-S20/S21
• Transport Package: SRS Standard or Customised
• Trademark: SRS
• Origin: China
• HS Code: 8484200090
• Production Capacity: 50000PCS/Year

Product Description

 

Product Description

Suggested operating limits

Temperature: -20 - 120ºC

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.

 

SIZE/INCH	d	D3	D31	D6	D7	L3	L4
0.500	12.7	24.0	22.8	19.05	25.40	20.62	7.95
0.625	15.8	26.7	26.7	23.80	31.75	22.23	10.31
0.750	19.0	31.2	30.4	26.97	34.93	22.23	10.31
0.875	22.2	33.6	33.4	30.15	38.10	23.80	10.31
1.000	25.4	43.2	39.3	33.32	41.28	25.40	11.10
1.125	28.5	46.5	42.0	36.50	44.45	26.97	11.10
1.250	31.7	49.5	45.8	39.70	47.63	26.97	11.10
1.375	34.9	52.7	49.3	42.85	50.80	28.58	11.10
1.500	38.1	56.0	52.8	46.05	53.98	28.58	11.10
1.625	41.2	62.2	55.5	50.80	60.33	34.93	12.70
1.750	44.4	66.0	61.0	53.97	63.50	34.93	12.70
1.875	47.6	66.0	64.0	57.15	66.68	38.10	12.70
2.000	50.8	73.0	66.0	60.33	69.85	38.10	12.70
2.125	53.9	73.5	71.5	60.33	76.20	42.85	14.27
2.250	57.1	79.6	79.6	61.90	79.38	42.85	14.27
2.375	60.3	82.0	79.6	65.10	82.55	46.05	14.27
2.500	63.5	85.0	81.5	68.25	85.73	46.05	14.27
2.625	66.6	88.5	84.6	71.42	85.73	49.20	15.88
2.750	69.8	92.7	90.0	74.60	88.90	49.20	15.88
3.000	76.2	102.0	96.8	80.95	98.43	52.37	15.88

 

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