Jiaxing Burgmann Mechanical Seal Co., Ltd. Jiashan King Kong Branch

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Grundfos Cartridge Pump Seal 43mm

Name: Grundfos Cartridge Pump Seal 43mm
Brand: Jiaxing Burgmann Mechanical Seal Co., Ltd. Jiashan King Kong Branch
SKU: Sarlin 43
Price: 46.00 USD
Availability: InStock

Product Details

Place of Origin: Zhejiang, China

Brand Name: JG

Certification: FDA certificate

Model Number: Sarlin 43

Payment & Shipping Terms

Minimum Order Quantity: 1pcs

Price: USD

Packaging Details: white box

Delivery Time: 3~10DAYS

Payment Terms: T/T,Western Union,MoneyGram

Supply Ability: 1000PCS

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Specifications

Description

Specifications

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                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              Grundfos 43mm cartridge pump seal, mechanical seal replacement for Grundfos, 43mm pump seal cartridge replacement
                                                  

Product Name:	Grundfos Cartridge Pump Seal 43mm	Size:	43mm
Application:	Heavy Industrial Fluid Handling	Pressure:	Up To 1Mpa
HS Code:	8484200090	Temperature:	-30 To +200℃
Speeds:	15m/s	Metal Parts:	SS304,SS316

Product Name:	Grundfos Cartridge Pump Seal 43mm
Size:	43mm
Application:	Heavy Industrial Fluid Handling
Pressure:	Up To 1Mpa
HS Code:	8484200090
Temperature:	-30 To +200℃
Speeds:	15m/s
Metal Parts:	SS304,SS316

Description

Grundfos Cartridge Pump Seal 43mm

In high-flow water supply and heavy industrial fluid handling, the 43mm shaft diameter is the standard specification for the larger Grundfos vertical multistage pump ranges, specifically the CR32, CR45, CR64, and CR90 series. Given that these pumps are typically equipped with high-power motors (up to 45kW and above), the mechanical seal must maintain absolute integrity under high torque, extreme axial thrust, and severe pressure fluctuations.

Our 43mm Cartridge Seal is engineered as a premium alternative to the original HQQE/HQQV series. Featuring a hydraulically balanced architecture, it is capable of sustaining operating pressures up to 30 bar. Unlike traditional component-style seals, this cartridge design eliminates installation errors and protects expensive pump shafts via an integrated sleeve, serving as a mission-critical upgrade to improve your system's Mean Time Between Failure (MTBF).

Technical Matrix (43mm Series)

Parameter	Specifications	Engineering Insights
Bore/Shaft Size	43mm	Optimized for CR32 / 45 / 64 / 90 series
Max Operating Pressure	≤ 30 bar (435 psi)	Balanced design to reduce face loading
Temperature Range	-30°C to +120°C (Std)	Custom versions up to +180°C available
Velocity Limit	≤ 25 m/s	Suited for high-peripheral speed applications
Seal Face Materials	SiC / Tungsten Carbide (TC)	Superior thermal conductivity to prevent heat checking
Secondary Seals	EPDM (HQQE) / Viton (HQQV)	Optimized for chemical and thermal compatibility
Structural Metal	AISI 316 Stainless Steel	Enhanced resistance to pitting and crevice corrosion

Professional Analysis: Why 43mm Requires Specialized Cartridge Engineering

High-Torque Transmission Stability: Pumps in the 43mm bracket generate immense starting torque. Our seals feature reinforced drive lugs. The torque is transmitted through the rigid metal sleeve rather than the elastomer, preventing catastrophic rubber bellows shear during rapid motor ramp-up.
Hydraulic Balancing Technology: At larger shaft diameters, the closing force exerted by hydraulic pressure can be overwhelming. A non-balanced seal would suffer from rapid wear due to excessive face friction. Our balanced 43mm design optimizes the pressure-area ratio, ensuring a stable, micron-thick lubricating film even under high-head conditions.
Shaft Protection & Longevity: Replacing a 43mm Grundfos pump shaft is a high-cost operation. The cartridge unit incorporates an internal stainless steel sleeve; all O-ring movement occurs against the sleeve rather than the shaft, effectively eliminating shaft scoring and fretting corrosion.
Standardized Coding Compliance:
- HQQE (EPDM): Recommended for boiler feed water and municipal supply where resistance to hot water and sterilization chemicals is required.
- HQQV (Viton/FKM): Essential for industrial cooling, process water with chemical additives, or any media containing hydrocarbons.

Expert Q&A & Maintenance Insights

Q: Why are 43mm seals more prone to "Heat Checking" than smaller sizes?

A: As the shaft diameter increases, the peripheral velocity at the seal faces rises sharply, generating significant frictional heat. We utilize Reaction Bonded Silicon Carbide (RBSiC) for our 43mm faces, which provides the high thermal conductivity necessary to dissipate heat and prevent thermal stress cracking.

Q: What is the most critical step when installing a 43mm Cartridge Seal?

A: The management of the assembly spacers (set plates). You must tighten all grub screws (set screws) to the shaft before removing the set plates. For a 43mm shaft, even a slight axial misalignment will alter the spring pre-load, leading to premature leakage or face instability.

Q: Can I order based on Grundfos Part Numbers?

A: Yes. Our 43mm units are direct replacements for common OEM numbers such as 96531299 (HQQE) and 96531300 (HQQV), ensuring a seamless fit-and-function match.

Q: How do I determine if an upgrade to Viton (HQQV) is necessary?

A: If your process media contains trace oils, cleaning agents, or if the water temperature fluctuates with organic content, Viton is the safer choice due to its broader chemical resistance profile compared to EPDM.

Product Advantages

Spring unit averted from the product so no sticking and clogging of the springs
Safe operation (no fractures) because of seal face locking by square pin
Suitable for pressure reversals
Operation in vacuum without additional seat locking possible
No damage of the shaft by a dynamically loaded O-Ring
Small installation sizes
Best suitable for conversions, no adaptations of the pump
Insensitive to solid containing and abrasive media
Advantages of a balanced seal even with plain shafts
Insensitive to shaft movements because of the stationary design

Application Areas

Water and waste water technology
Chemical industry
Refining technology
Dirty, abrasive and solid containing media
Fugitive hydrocarbons (no API seal!)
Sticky and stringy media
Chemical standard pumps
Sewage pumps

Shipping & Payment Terms

Port of Loading: Shanghai

Shipping Method: DHL, UPS, FEDEX, TNT, etc

Payment Terms: T/T, Western Union, MoneyGram

Our Services

OEM/ODM orders are available for our factory
Accept customized mechanical seals according to your drawing or requirements
Small quantity is accepted
Provides excellent quality with competitive price

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