Durable Mechanical Seal Type 21 for Industrial Applications and Machinery

• Customization: Available
• Structure: Single End
• Pressure: High Pressure Mechanical Seals
• Model NO.: QT-21
• Speed: General Speed Mechanical Seal
• Temperature: Low-Temperature Mechanical Seal
• Performance: Temperature
• Standard: Standard
• Type: Qt-Type 21
• Balance: Balanced
• Brand: Queeny
• Price: Lower Than Original
• Delivery Time: Stock
• Quality: 12 Month Guarantee
• Transport Package: Beautiful Package
• Specification: Customized
• Trademark: Queeny
• Origin: Shanghai, China
• HS Code: 8484200090
• Production Capacity: 300000PCS
• Package Size: 10.00cm * 10.00cm * 10.00cm
• Package Gross Weight: 1.000kg

Product Description

Parameter	Value/Description	Unit/Note
Model	QT-21	Compact combustible gas detector for versatile use
Standards Compliance	GB15322.3-2019 (China National Standard)	Designed for portable or fixed installation scenarios
Sensing Principle	Catalytic combustion sensor	Optimized for detecting LPG, methane, and other common combustible gases
Measurement Range	0-100% LEL	High-resolution display (0.1% LEL increment)
Alarm Thresholds	- Low: 20% LEL - High: 50% LEL	User-adjustable via interface
Response Time	≤20 seconds (T90)	Fast-acting detection for emergency situations
Alarm Type	- Audible: ≥75 dB at 1m - Visual: LED indicator - Vibration alarm (for portable version)	Multi-sensory alerts for different use cases
Communication	- USB (for data logging) - Wireless: Bluetooth (optional)	Data transfer to mobile devices or PCs
Power Supply	- Rechargeable Li-ion battery: 8-hour runtime - DC 5V via micro-USB	Portable version: battery-powered; Fixed version: external power supply
Environmental Conditions	- Temperature: -10°C ~ 50°C - Humidity: 10%~90% RH	Suitable for indoor and semi-outdoor environments
Dimensions	120 mm × 60 mm × 30 mm (portable)	Lightweight and handheld design (≈200g)
Certifications	CCC, CE (EMC/LVD)	Compliance with Chinese and European standards
Applications	Home safety, small workshops, gas cylinder storage	Ideal for residential and small-scale commercial use
Optional Features	- Calibration reminder - Data storage (up to 1000 records)	Enhanced usability for maintenance and compliance

Queeny design engineers are able to produce a seals solution for the most basic applications,to those that are extremely complicated and unique. We are able to provide you these solutions supported by life test data and years of excellent field performance.As your partner, we provide sealing solutions for centrifugal pumps,agitators and other rotating equipment, and help you consolidate your brand and market position.

 

Our products are made of high quality materials and manufacturing processes, with a long service life and low cost of use. It can effectively reduce the maintenance costs and operating costs of equipment .

 

Our mechanical seals are designed to be easy to service and replace,simply by removing the sealing components and replacing the sealing surface and sealing ring. Compared with other sealing forms, our products are more convenient to repair and replace.

 

Mechanical seal is suitable for high temperature, low temperature, high pressure, vacuum and corrosive media and other complex environment, to ensure the stable operation of the equipment.

Shanghai Queeny Mechanical Equipment Co.,Ltd.is an enterprise specializing in the R&D,manufacture and export of mechanical seal products,headquartered in Pudong New Area,Shanghai.Our products mainly include component seals,dry gas seals,metal bellows seals,mixer and agitator seals,single & dual cartridge seals,silicon carbide parts and tungsetn carbide parts,which can replace John Crane, Burg--mann, AES, Chesterton,Flowserve,Rotenand other similar products,they are widely used in water treatment,petroleum,chemical,food,medical and other industries.
Relying on first-class technology and professional services,since its establishment, Queeny has carried out in-depth cooperation with hundreds of companies in more than 70 countries around the world.Our products are exported to Asia,Europe,North America,South America,Oceania and Africa in large quantities every year,and have been widely praised.Super high cost performance is the basis of our long-term cooperation with customers.We always rigorously treat clients' requirements,strictly control the production process,and comprehensively monitor the export procedure.It is our mission to reduce production and operation costs for more enterprises all over the world.Q1: Are you a trading company or a factory?
We are a factory, so we can offer you factory prices with high quality.

Q2: Can I get samples?
Yes. You can ask for samples. Usually it's free, but you need to pay for shipping.

Q3: Can l use my own logo or design on the goods?
Yes, we provide OEM/ODMservices; your logo and design can be printed on the products.

Q4: What are your payment terms?
We accept T/T, Paypal, Western Union, and credit card payment is also welcome.

Q5: How about the delivery time?
For stock items, we can ship immediately after receiving the payment.
For other products, we need 14-25 days for mass production, which depends on the quantity and type of order.

Q6: How can we ensure the quality?
Pre-production samples are required before mass production;Final inspection is required before shipment;

Q7: 1 can't find our products in your catalog, can you customize the products for us?
Yes, customized products are available, OEM is welcome.

Q8: Can l buy pumps or pump parts from your company?
Yes, we also provide pumps and pump parts.