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NINGBO MIAOYU MACHINERY TECHNOLOGY CO., LTDNINGBO MIAOYU MACHINERY TECHNOLOGY CO., LTD

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John Crane Type 1 O-Ring Pusher Mechanical Seals Replacement

John Crane Type 1 O-Ring Pusher Mechanical Seals Replacement
John Crane Type 1 O-Ring Pusher Mechanical Seals Replacement
John Crane Type 1 O-Ring Pusher Mechanical Seals Replacement
thumb John Crane Type 1 O-Ring Pusher Mechanical Seals Replacement
John Crane Type 1 O-Ring Pusher Mechanical Seals Replacement
John Crane Type 1 O-Ring Pusher Mechanical Seals Replacement

John Crane Type 1 O-Ring Pusher Mechanical Seals Replacement

• Positive Drive: The spring grips the shaft (interference fit) to drive the rotary head, eliminating the need for set screws that can mar the shaft.

• Balanced Face Loading: The single spring provides uniform face pressure, ensuring a tight seal even as the face wears down over time.

Model:RO
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Key Features

• Industry Standard: The definitive replacement for the John Crane Type 1, the most widely used seal in the world.

• Non-Clogging Spring: Features a large single coil spring that is resistant to clogging by solids and sediment, unlike multi-spring designs.

• Self-Aligning: The flexible O-ring mounting allows the seal face to adjust to shaft end-play and runout automatically.



Technical Specs

Materials

Mediums

Water, oil, acids, alkali with low corrosion etc.

Stationary Ring

Carbon/Sic/TC

Temperature

-20℃ to 180℃

Rotary Ring

Sic/TC/SUS304

Pressure

≤1MPa

Secondary Seal

NBR/EPDM/Viton

Speed

≤20m/s

Spring and Metal Part

Stainless Steel


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Product Specifications

Metric Shaft Size D1 Size Code D3 D7 L1 L3 L4
20 0200 34 42 35 25 23
22 0220 36 44 35 25 23
24 0240 38 46 35 25 23
25 0250 39 47 35 25 23
28 0280 42 50 35 25 23
30 0300 44 52 35 25 23
32 0320 46 54 35 25 23
33 0330 47 55 35 25 23
35 0350 49 57 35 25 23
38 0380 54 64 38 27 25
40 0400 56 66 38 27 25
42 0420 58 68 38 27 25
43 0430 59 69 38 27 25
45 0450 61 71 38 27 25
48 0480 64 74 38 27 25
50 0500 66 76 39 27 25
52 0520 68 78 40 27 25
53 0530 69 79 40 27 25
55 0550 71 81 40 27 25
58 0580 76 89 41 30 28
60 0600 78 91 41 30 28
62 0620 80 93 41 30 28
63 0630 81 94 41 30 28
65 0650 83 96 41 30 28
68 0680 86 99 41 32 30
70 0700 90 101 42 32 30
75 0750 95 110 42 32 30
80 0800 100 115 42 33 31
85 0850 105 120 43 33 31
90 0900 110 125 45 33 31
95 0950 115 130 45 33 31
100 1000 120 135 45 33 31



Workshop

This workshop is equipped with professional processing equipment and integrated with standardized material warehousing management, enabling a one-stop production process from precision machining to finished product delivery. It ensures part machining accuracy and production efficiency, meeting various high-specification manufacturing requirements.


Metal Bellows Seals for High Temperature Pumps 606
Metal Bellows Seals for High Temperature Pumps 606
Metal Bellows Seals for High Temperature Pumps 606
Metal Bellows Seals for High Temperature Pumps 606



Product Research, Development and Testing

Our Product R&D and Testing focuses on optimizing seal performance through advanced simulation and material analysis. All seals undergo rigorous trials, including thermal cycling and pressure tests, to ensure durability, minimal leakage, and long service life in demanding industrial environments.


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Industry Solutions

Metal Bellows Seals for High Temperature Pumps 606
Metal Bellows Seals for High Temperature Pumps 606
Metal Bellows Seals for High Temperature Pumps 606
Metal Bellows Seals for High Temperature Pumps 606




Case Study

Pulp & Paper Mill: Replaced OEM Type 1 seals on white water pumps with our aftermarket equivalents. The robust single spring handled the fiber content without clogging, matching the OEM performance at 40% savings.

Testimonials

A true drop-in replacement. We switched our entire plant over to these Type 1 equivalents and haven't seen any difference in performance.

—Maintenance Manager, Paper Mill



FAQs about Metal Bellows Seals for High Temperature Pumps

Q: How do I know if I need a Type 1 or Type 21?

A: The Type 1 has a large single spring that grips the shaft. The Type 21 has a shorter working length and a drive band around the spring. Check your old seal; if the spring touches the shaft directly, it's likely a Type 1.

Please Contact Us!
Get Started With Your Next Project.
If you have any questions about our products and services, please feel free to contact us. Our team will get in touch with you within 24 hours!
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    Our company is specialized in the production of sealing materials, mechanical seals , cartridge seals.

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