Name: Servomotors for Marine Boilers | SIEMENS SQN Model
Brand: JIEXI Fast Marine Service(Guangzhou) Co., Ltd
SKU: SQN30、SQN31、SQN41
Availability: InStock
Rating: 5 (1 reviews)

Description

Functional Role in Marine Boiler Systems
The SIEMENS SQN servomotors fulfill a vital role within marine boiler mechanisms by providing accurate angular control of valves and dampers. These servomotors are intended primarily for ship engineers and procurement professionals responsible for maintaining the operational integrity of marine boilers. By precisely regulating steam flow, they ensure the effective heating of fuel and cargo oil, pivotal for maintaining combustion stability under varying loads. Suppliers and operators can rely on these marine boiler parts to support essential onboard systems such as steam fire suppression and desalination, representing core components in the marine boiler spare parts ecosystem.

Detailed Technical Specifications and Engineering Compliance
Featuring synchronous motor construction with IP40 protection compliant with DIN 40050 standards and safety class I per VDE 0631, these servomotors deliver dependable performance suitable for harsh maritime environments. They provide angular positioning accuracy up to 160 degrees and holding torque ranging from 0.8 to 6 Nm depending on model variant (SQN30, SQN31, SQN41). The compact design, with average weight around 800 grams, includes flexible mounting options and standardized screw terminal cable connections, enabling integration versatility. Power consumption remains low at 6.5 VA, optimizing efficiency within marine boiler parts configurations offered by leading marine boiler spare parts manufacturers.

Industry-Ready Applications and Operational Impact
Restricted to maritime vessels, these servomotors excel in regulating boilers’ critical operational elements such as feed pumps and steam valves, maintaining system stability and energy efficiency. In addition to their role in combustion control, these actuators also support auxiliary services on board—such as heating in winter air conditioning systems and steam supply for cargo and fire safety operations. Their integration into control systems enhances the reliability of marine boiler parts supply networks and ensures compliance with industry-standard marine boiler spare parts wholesale demands, emphasizing operational safety and continuity in rigorous shipping conditions.

Specification

Mains voltage	AC 220…240 V –15 % +10 %
Mains voltage	AC 100…110 V –15 % +10 %
Mains frequency	50...60 Hz ±6 %
Primary fuse (external)	6.3 AT (customer responsible for installation)
Type of motor	synchronous motor
Power consumption	6.5 VA
Angular position	max. 160°
Mounting position	optional
Degree of protection	IP 40 to DIN 40050, provided adequate cable entries and fixing screws are used
Safety class	I to VDE 0631
Cable connections	screw terminals for wires having a cross-sectional area of 0.5 to 2.5 mm²
Ferrules	matching the dia. of the stranded wire
Weight (on average)	approx. 800 g

Function
1、Precise control of the heating of fuel and cargo oil: Through the servo motor, the flow of steam generated by the boiler can be precisely adjusted, thus controlling the heating temperature of fuel and cargo oil, ensuring the appropriate temperature for the operation of the ship.
2、Drive equipment: Servo motors can be used to drive key equipment such as boiler feed pumps and cargo pumps to ensure that these equipment can operate efficiently under different load conditions.
3、Meet daily life needs: Servomoters can help regulate the supply of steam to meet the daily life needs of crew and passengers, such as steaming rice, boiling water, bathing, heating and drying clothes.
4、Desalination and winter air conditioning: Servomotors can be used to control heating sources in desalination units and winter air conditioning units, ensuring the efficient operation of these systems.
5、Steam fire suppression and other cleaning tasks: When tasks such as steam fire suppression or cleaning of oil pools and filters are required, servomotors can precisely control the supply of steam, ensuring that these tasks are completed safely and efficiently.
6、Holding torque:
SQN3... 0.8...3 Nm

SQN4... 6 Nm

7、Running time:

SQN3... 4.5...30 s
SQN4... 120 s
8、Direction of rotation:

SQN30... counterclockwise

SQN31... / SQN41... clockwise

Warning notes
To avoid injury to persons, damage to property or the environment, the following warning notes must be observed!

Do not interfere with or modify the actuators!

1、All activities (mounting, installation and service work, etc.) must be performed by qualified staff.

2、Before making any wiring changes in the connection area of the actuators, completely isolate the equipment from the mains supply (all-polar disconnection). Ensure that the plant cannot be inadvertently switched on again and that it is indeed dead. If not observed, there is a risk of electric shock hazard.

3、Ensure protection against electric shock hazard by providing adequate protection for the connection terminals and by securing the housing cover.

4、Each time work has been carried out (mounting, installation, service work, etc.), check to ensure that wiring is in an orderly state.

5、Fall or shock can adversely affect the safety functions. Such actuators must not be put into operation, even if they do not exhibit any damage.

Type summary (others types of actuators are available on request)

Legend

Refer to «Dimensions»
At 60 Hz, running times are about 20 % shorter
AC 100…110 V +10 % / -15 % possible, but in case of undervoltage torque is reduced by about 20 %
AC 220…240 V +10 % / -15 % possible, but in case of undervoltage torque is reduced by about 20 %
Suited for fitting a potentiometer (refer to «Fitting a potentiometer»)
Under nominal conditions; under extreme conditions (e.g. +60 °C, AC 230 V –15 %) about –25 %
Optional auxiliary switches (in addition to the 2 end switches)
When facing the drive shaft and when control voltage is fed to end switch I
On time at:

- AC 220 V -15 % / +10 % and 50 Hz – max. 50 %
- AC 240 V -15 % / +10 % and 50 Hz – max. 35 %

Dimensions

FAQ

What materials and standards are used in the production of SIEMENS SQN servomotors?
The SIEMENS SQN servomotors are built with synchronous motors featuring IP40 protection according to DIN 40050 standards and safety class I (VDE 0631). These marine boiler spare parts ensure high durability and compliance for reliable shipboard operation.

Can JIEXI customize servomotors for specific marine boiler configurations?
JIEXI offers servomotors designed with optional mounting positions and tailored direction of rotation, allowing flexibility to meet different ship boiler system requirements. For specialized adjustments, consult our technical team regarding custom solutions in marine boiler parts manufacturing.

What installation guidelines should be followed for servomotors in marine boilers?
Servomotors must be installed by qualified personnel with full isolation from mains power. Proper fixing and sealing ensure IP40 protection, and the external 6.3 AT fuse—part of the marine boiler spare parts supply—must be installed by the customer for safety.

How does JIEXI handle the logistics and supply of marine boiler parts wholesale?
JIEXI Fast Marine Service maintains a robust supply chain for marine boiler spare parts wholesale, ensuring timely delivery and consistent stock of SIEMENS SQN servomotors. Businesses can rely on their factory-level production and responsive service worldwide.

Servomotors for Marine Boilers | SIEMENS SQN Model

Description

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