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Type ST Armstrong Series Pump 4300 John Crane Mechanical Seal for Effective Fluid Containment

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Type ST Armstrong Series Pump 4300 John Crane Mechanical Seal for Effective Fluid Containment

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Brand Name : YUE MI

Model Number : ST

Certification : ISO SGS

Place of Origin : Guangzhou, China

MOQ : 10/PCS

Price : consult

Payment Terms : L/C, D/A, D/P, T/T, Western Union, MoneyGram

Supply Ability : 500/Set/Month

Delivery Time : 5-8 work days

Packaging Details : Details Carton

Dimensions : Depend your model

Speedlimit : ≤10m/s

Elatomer : NBR, EPDM, Viton

Transport Package : YUEMI Standard or Customised

Model No : ST

Product Type : Armstrong Pump Seal

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Type ST Armstrong Series Pump 4300 John Crane Mechanical Seal for Effective Fluid Containment

d(inch) d(mm) D1 D3 L1 L2 L3
YM ST-1-1/8 28.575 59.40 47.60 25.30 25.60 15.90
YM ST-1-5/8 41.275 71.80 62.00 25.30 29.50 15.90
YM ST-2-1/8 53.975 84.60 79.40 25.30 29.30 15.90
YM ST-2-5/8 66.675 111.0 88.90 25.30 41.30 15.90

Product Description

Parameter Value/Description Unit/Note
Model YM-ST Standard Temperature (ST) or Special Type mechanical seal
Seal Type Single-Spring Unbalanced Seal Cost-effective for general industrial applications
Face Materials - Rotating: Carbon Graphite
- Stationary: Silicon Carbide (SiC)		 Graphite/SiC pairing for moderate wear resistance
Housing Material Stainless Steel 304 (Standard)
- 316L (Optional)		 316L for corrosion resistance in chemical environments
Pressure Range10 1.2 MPa Suitable for low-to-medium pressure pumps (e.g., water, oil)
Shaft Diameter Range 20 mm - 60 mm Common shaft sizes in pumps and mixers
Maximum Rotational Speed 2900 RPM Matches standard motor speeds (50 Hz)
Temperature Range -20°C ~ 140°C Elastomer: NBR (standard); FKM up to 180°C (optional)
Leakage Rate ≤10 m/s Meets ISO 21049 standards for non-critical services
Media Compatibility - Water, Mineral Oils, Aliphatic Hydrocarbons Not recommended for strong acids, alkalis, or solvents
Installation Type Insertion-Mounted (Simple Axial Fit) Requires basic alignment; suitable for field repairs
Elastomer Material NBR (Standard)
- FKM (For High-Temp/Chemicals)		 NBR: pH 6-8 compatibility; FKM: pH 0-14
Standards Compliance ISO 21049, RoHS Certified for environmental and safety requirements
Key Features - Anti-Rotation Pin
- Pre-Lubricated Faces
- Economical Spare Parts		 Simplified maintenance; ideal for non-critical processes


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