描述
SUN NFED-LHN是一款高性能全调型节流阀，属于美国SUN Hydraulics公司插装阀系列，广泛应用于液压系统流量控制。以下是其核心功能与技术参数的综合概述：
一、核心功能与技术特点
全调型节流调节
-针阀设计允许流量在全闭与最大节流口直径之间无限调节，适用于精确流量控制或截止阀功能。
-无压力补偿结构，流量大小与1口、2口压差的平方根成比例。
双向液流与推荐流向
-支持双向液流，但推荐流向为1口至2口，以确保与其他流量控制阀的互换性。
-当调节杆旋至关闭位置时，阀体无泄漏。
通用性与互换性
-所有2口流量控制阀在形状和功能上可相互替换（相同流道和孔型），但安装部分的外部尺寸可能不同。
材料与密封性能
-阀体材质为铝合金或碳钢，配置EPDM密封圈，适用于磷酸酯液压油系统；避免接触石油基油或润滑油脂以防止密封损坏。
二、技术参数
参数规格
插孔类型T-16A
系列3
通流能力340 L/min（17.5 mm孔径）
最大操作压力350 bar
调节圈数全关到全开逆时针5圈
阀头部六角尺寸31.8 mm
安装扭矩203-217 Nm
调节螺栓尺寸内六角4 mm
锁紧螺母尺寸六角15 mm
锁紧力矩9-10 Nm
重量0.56 kg
三、性能优势
高压力适应性
-平衡的调节结构可在高压力环境下轻松调节，锐边小孔设计减小粘度对流量的影响。
低泄漏与可靠性
-阀体内部组件经热处理，耐磨抗疲劳，出厂前通过功能测试，确保长期稳定运行。
安装灵活性
-浮动式结构设计减少安装扭矩敏感度，避免内部零件卡滞，清洁或检查时无需改变设定或拆卸配管。
四、应用场景
工程机械：液压系统流量控制、负载调节。
船舶与海工：液压设备精准流量分配。
工业机械：机床、冶金设备、医疗器械中的液压回路设计。
能源领域：风电、石油钻井设备的液压系统优化。
O3EX HENF315845R2
O3EX HENF315845R2
SUN NFED-LHN is a high-performance fully adjustable throttle valve,which belongs to the cartridge valve series of SUN Hydraulics,USA,and is widely used in hydraulic system flow control.The following is a comprehensive overview of its core functions and technical parameters:
I.Core functions and technical features
Fully adjustable throttle adjustment
-The needle valve design allows the flow to be infinitely adjusted between full closure and the maximum throttle diameter,suitable for precise flow control or shut-off valve function.
-There is no pressure compensation structure,and the flow size is proportional to the square root of the pressure difference between port 1 and port 2.
Bidirectional flow and recommended flow direction
-Supports bidirectional flow,but the recommended flow direction is from port 1 to port 2 to ensure interchangeability with other flow control valves.
-When the adjustment rod is rotated to the closed position,the valve body is leak-free.
Versatility and interchangeability
-All 2-port flow control valves are interchangeable in shape and function(same flow path and hole type),but the external dimensions of the mounting part may be different.
Materials and sealing performance
-The valve body is made of aluminum alloy or carbon steel,equipped with EPDM sealing ring,suitable for phosphate ester hydraulic oil system;avoid contact with petroleum-based oil or lubricating grease to prevent seal damage.
2.Technical parameters
Parameter Specification
Socket type T-16A
Series 3
Flow capacity 340 L/min(17.5 mm aperture)
Maximum operating pressure 350 bar
Number of adjustment turns Fully closed to fully open 5 turns counterclockwise
Hexagonal size of valve head 31.8 mm
Installation torque 203-217 Nm
Adjusting bolt size Hexagonal 4 mm
Lock nut size Hexagonal 15 mm
Locking torque 9-10 Nm
Weight 0.56 kg
3.Performance advantages
High pressure adaptability
-The balanced adjustment structure can be easily adjusted under high pressure environment,and the sharp edge small hole design reduces the influence of viscosity on flow.
Low leakage and reliability
-The internal components of the valve body are heat-treated,wear-resistant and fatigue-resistant,and pass the functional test before leaving the factory to ensure long-term stable operation.
Installation flexibility
-The floating structure design reduces installation torque sensitivity and avoids internal parts from getting stuck.There is no need to change settings or disassemble piping for cleaning or inspection.
IV.Application scenarios
Engineering machinery:hydraulic system flow control and load regulation.
Ships and offshore engineering:precise flow distribution of hydraulic equipment.
Industrial machinery:hydraulic circuit design in machine tools,metallurgical equipment,and medical devices.
Energy field:hydraulic system optimization of wind power and oil drilling equipment.
