Reliable Mechanical Seal M7n/M74D for Efficient Pump Operation

• Customization: Available
• Structure: Single End
• Pressure: Medium Pressure Mechanical Seals
• Model NO.: QT-SEAL-M7N/M74D
• Speed: General Speed Mechanical Seal
• Temperature: Poor Temperature Mechanical Seal
• Performance: Wear
• Standard: Standard
• Type: M7n/M74D
• Balance: Unbalanced
• Delivery Time: in Stock
• After Sales Service: Effieient and Fast
• Type of Shipping: DHL/FedEx/UPS
• MOQ: 2PCS
• Transport Package: Customized
• Specification: standard
• Trademark: Queeny
• Origin: China
• HS Code: 848420
• Production Capacity: 5000
• Package Size: 10.00cm * 10.00cm * 10.00cm
• Package Gross Weight: 1.000kg

Product Description

Parameter	QT-SEAL-M7N	QT-SEAL-M74D
Seal Type	Single-Ended Unbalanced	Double-Ended Balanced
Material of Construction - Body	Carbon Steel	Stainless Steel 316
Material of Construction - Face	Tungsten Carbide	Silicon Carbide
Material of Construction - O-Ring	EPDM	HNBR
Operating Pressure Range	0 - 1.6 MPa	0 - 2.5 MPa
Temperature Range	-40°C to 120°C	-20°C to 150°C
Shaft Diameter Compatibility	15 - 50 mm	20 - 60 mm
Maximum Rotational Speed	2000 RPM	3000 RPM
Shaft Hardness Requirement	≥ 28 HRC	≥ 32 HRC
Axial Runout Tolerance	≤ 0.05 mm	≤ 0.03 mm
Radial Runout Tolerance	≤ 0.08 mm	≤ 0.06 mm
Installation Depth	35 mm	42 mm
Seal Face Flatness	≤ 0.0009 mm	≤ 0.0006 mm
Spring Rate	8 N/mm	12 N/mm
Spring Compression Range	4 - 6 mm	5 - 7 mm
Viscosity Limit of Media	500 cP	800 cP
Chemical Resistance - Acids	Moderate	Excellent
Chemical Resistance - Bases	Good	Excellent
Leakage Rate	≤ 5 ml/h	≤ 3 ml/h
Weight	0.3 kg	0.5 kg
Certification Compliance	ISO 9001, API 682	ISO 9001, API 682
Lubrication Requirement	Requires External Lubrication	Self-Lubricating
Shaft Surface Finish Requirement	Ra 0.8 - 1.6 μm	Ra 0.4 - 0.8 μm
Compatibility with Pump Types	Centrifugal Pumps	Centrifugal, Reciprocating Pumps

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.

Mechanical sealing adopts the principle of mechanical friction sealing, which has excellent sealing performance, which can effectively prevent leakage and protect the safety of the environment and equipment. Compared with traditional packing seals and rotary seals, the sealing effect of mechanical seals is more reliable.

 

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 .

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.


Basic Features
Structure: Single-ended
Pressure: Medium pressure mechanical seal
Speed: high-speed mechanical seal
Temperature: temperature mechanical seal
Performance: Wear
Standards: DIN24960, ISO3069 and GB6556
Model: M7N, M74, M74D (2 M74 seals)
Balance: unbalanced
Specifications: Inner diameter: 20 mm to 300 mm
Product details
M7N, AKA M74 mechanical seal, used for chemical centrifugal pumps, Kaiquan water pumps and double suction pumps

Structural features: single-ended, wave spring (M7N), multiple springs (M74), unbalanced, independent rotation direction, lug drive. M7N has a simple transmission method and good compatibility. The wave spring structure allows the transfer of particles, crystals and high viscosity content. The transmission mode of M74 is also very simple, and the compensation components are pre-assembled; it is easy to install and has good compensation. The load on the sealing surface is balanced, and the sealing performance is stable and reliable.



Scope of application: Widely used in chemical processing, oil refining, petrochemicals, sewage treatment, pharmaceuticals and food production. Designed for chemical pumps, water pumps, screw pumps, sewage pumps, double suction pumps, papermaking equipment and other rotating equipment.

Operating parameters:
Pressure: below 1.6 MPa
Temperature: -420~200ºC
Linear speed: 20 m/s or less