John Crane Type 1 O-Ring Pusher Mechanical Seals Replacement

John Crane Type 1 O-Ring Pusher Mechanical Seals Replacement

MIAOYU offers direct replacement John crane type 1 mechanical seals for general service pumps. This standard single-spring design provides reliable sealing for water, oils, and mildly corrosive fluids. Pusher mechanical seals are available in a wide range of shaft sizes with various face material options (SiC, TC, Carbon) to match OEM dimensions and performance, ensuring easy installation and cost-effective maintenance.

Model:1
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Key Features


• Type 1 with O-Ring: A variation of the classic Type 1 that utilizes an O-ring secondary seal instead of the traditional elastomer bellow.

• High Pressure: The O-ring design is more robust against high pressure spikes than a rubber bellow.

• Universal Fit: Retains the standard Type 1 drive mechanism and dimensions for easy retrofitting.

• Robust Drive: The large single coil spring grips the shaft for positive drive, but the sealing is handled by a precision O-ring, offering a hybrid of robustness and high-pressure capability.

• Non-Clogging: The large spring resists fouling.


Technical Specs

Materials

Mediums

Water, oil and weakly-corrosive mediums

Stationary Ring

Ceramic/Sic/TC

Pressure

≤1.4MPa

Rotary Ring

Carbon/Sic/TC

Temperature

-20C to 120C

Secondary Seal

NBR/EPDM/Viton

Speed

≤15m/s

Spring and Metal Part

Stainless Steel


CF1-1.jpg
CF1-2.jpg



Product Specifications


D1 (inch)Size CodeD1 (mm)Size CodeD3D7L1L4
0.500012712012023.8025.4030.167.93
14014027.7631.7533.3210.30
0.625015816016027.7631.7533.3210.30
0.750019118018030.9434.9333.3210.30
20020034.1138.1034.9310.30
0.875022222022034.1138.1034.9310.30
24024038.1041.2839.6711.10
1.000025425025038.1041.2839.6711.10
1.125028628028041.2844.4441.2811.10
30030046.0247.6341.2811.10
1.250031732032046.0247.6341.2811.10
33033048.6850.8042.8511.10
1.375034935035048.6850.8042.8511.10
1.500038138038051.8553.9842.8511.10
1.625041240040058.1060.3850.8012.70
43043061.2763.5050.8012.70
1.750044445045061.2763.5050.8012.70
1.875047648048064.4466.6853.9812.70
2.000050850050067.2169.8553.9812.70
2.125053953053072.0276.2060.3314.28
2.250057155055075.3079.3860.3314.28
2.375060360060078.3082.5563.5014.28
2.500063563063081.5485.7363.5014.28
2.625066665065086.2285.7369.8515.90
2.750069870070089.4088.9073.0315.90
2.875073073073092.5795.2573.0315.90
3.000076275075095.7598.4373.0315.90



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.


john crane type 1 mechanical seal Production Equipment
john crane type 1 mechanical seal Production Equipment
john crane type 1 mechanical seal Production Workshop
john crane type 1 mechanical seal Production Workshop



Product Research, Development and Testing


Our Product R&D and Testing focuses on optimizing seal performance through advanced simulation and material analysis. All john crane type 1 mechanical seals undergo rigorous trials, including thermal cycling and pressure tests, to ensure durability, minimal leakage, and long service life in demanding industrial environments.


john crane type 1 mechanical seal R&D and Design.jpg
john crane type 1 mechanical seal microscope.jpg
john crane type 1 mechanical seal Light band detection.jpg
john crane type 1 mechanical seal pressure test.jpg



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


Hydraulic Oil Pump: A standard bellow seal was rupturing under pressure spikes. We installed this Type 1 O-Ring Pusher. The O-ring handled the pressure, and the spring provided the necessary torque transmission.

Testimonials


A tough John crane type 1 mechanical seal. We use it where standard bellow seals blow out.

—Hydraulic Repair Shop, USA



FAQs about John Crane Type 1 O-Ring Pusher Mechanical Seals Replacement


Q: Is this a Type 8-1?

A: No, Type 8-1 is a multi-spring O-ring seal. This is a single spring O-ring seal, keeping the non-clogging benefit of the John crane type 1 mechanical seal but with O-ring sealing.

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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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