B1

REPLACEMENT：

John Crane Type 1A

Full enclosed elastomer bellows design Insensitive to shaft play and run out Single spring

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Materials

Rotary Ring: CAR/SIC/TC
Stationary Ring: CER/SIC/TC
Secondary Seal: VIT/EP/NBR
Spring and Metal Parts: SUS304,SUS316

Operational Conditions

Temperature: -20℃ to +150℃
Pressure: ≤ 1.5 MPa
Speed: ≤15 m/s

Size

UMS STANDARD SIZES

Inch Shaft D	Size Code	Metric Shaft D	Size Code	D1	D2	D3	L1	L2
0.500	0127	12	0120	27.79	19.05	23.80	44.00	8.74
		14	0140	30.95	22.23	27.76	44.00	10.32
0.625	0158	16	0160	30.95	22.23	27.76	44.00	10.32
0.750	0191	18	0180	34.15	25.40	30.94	44.00	10.32
		20	0200	35.70	26.99	33.00	44.00	10.32
0.875	0222	22	0220	37.30	28.58	34.11	44.00	10.32
		24	0240	40.50	31.75	38.10	44.00	10.32
1.000	0254	25	0250	40.50	31.75	38.10	44.00	10.32
1.125	0286	28	0280	47.63	35.72	41.28	60.00	11.99
		30	0300	50.80	38.89	46.02	60.00	11.99
1.250	0317	32	0320	50.80	38.89	46.02	60.00	11.99
		33	0330	53.98	42.07	47.63	60.00	11.99
1.375	0349	35	0350	53.98	42.07	47.63	60.00	11.99
1.500	0381	38	0380	57.15	45.24	50.80	60.00	11.99
1.625	0412	40	0400	60.35	48.82	57.15	60.00	11.99
		43	0430	63.50	51.59	60.33	71.00	11.99
1.750	0444	45	0450	63.50	51.59	62.50	71.00	11.99
1.875	0476	48	0480	66.70	54.75	65.50	71.00	11.99
2.000	0508	50	0500	69.85	58.00	66.68	71.00	13.50
2.125	0539	53	0530	73.05	62.00	71.42	71.00	13.50
2.250	0571	55	0550	76.20	65.00	74.60	71.00	13.50
2.375	0603	60	0600	79.40	68.00	77.77	71.00	13.50
2.500	0635	63	0630	82.55	71.20	80.95	71.00	13.50
2.625	0666	65	0650	92.10	78.35	85.73	71.00	15.90
2.750	0698	70	0700	95.25	81.10	88.90	70.00	15.90
2.875	0730	73	0730	98.45	84.50	92.08	73.00	15.90
3.000	0762	75	0750	101.65	88.10	95.25	73.00	15.90

In modern industrial operations, preventing leakage and improving equipment reliability are critical challenges. Single spring mechanical seal provides an effective sealing solution designed for pumps, mixers, and rotating equipment. With stable performance, compact structure, and excellent durability, single spring mechanical seal helps industries maintain efficient operation and reduce unexpected downtime.

Featuring strong sealing capability and wear resistance, single spring mechanical seal performs well in demanding working environments. Its simple design allows easy installation and maintenance while ensuring consistent pressure balance. This product helps solve common issues such as fluid leakage, equipment damage, and high maintenance costs, providing long-term protection for industrial systems.

For example, a chemical processing plant used single spring mechanical seal in its pump systems to improve sealing performance. The solution reduced leakage problems, extended equipment service life, and increased production stability. This practical application shows how reliable sealing technology creates greater value for industrial users.

Choosing high-quality single spring mechanical seal allows businesses to achieve safer operation, lower maintenance expenses, and improved equipment efficiency. It is an ideal sealing choice for industries seeking durable, economical, and dependable mechanical solutions.

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If you have any enquiry about quotation or cooperation,please feel free to email us at SALES@UNIQUESEAL.COM or use the following enquiry form. Our sales will contact you with in 24 hours. Thank you for your interest in our products.

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