水液气电磁阀，DF-20

产品概述

DF-20水液气电磁阀是一款采用先导式结构的通用型电磁阀，专为液体（水、油等）、气体及低粘度介质（≤20CST）的自动化控制设计。其膜片式二次开阀结构确保了高灵敏度和可靠性，适用于工业管道系统中介质的快速通断控制。阀体材质可选黄铜或不锈钢，法兰或螺纹连接方式适配不同安装需求，工作压力范围0.03~0.8MPa，介质温度覆盖-10℃至+75℃。该产品线圈支持AC/DC多种电压（如AC220V、DC24V），绝缘等级为B级，功率12W（φ5~φ20规格），温升≤80℃，适合长时间稳定运行。1411

技术特点

DF-20电磁阀采用分步直动式设计，零压差启动，流量大且响应迅速（φ3~φ50口径启闭时间≤2秒）。其橡胶密封结构降低了对介质清洁度的要求，同时具备防泄漏性能。安装时需保持介质流向与阀体箭头一致，线圈朝上且倾斜度小于30°，以确保最佳性能。产品提供常闭（断电关闭）和常开（断电开启）两种形式，用户可根据系统需求灵活选择。此外，电源允许波动范围为-15%~+10%，适应不稳定电网环境。2616

应用场景

该电磁阀广泛应用于纺织、化工、食品加工、水处理等行业的流体控制系统中，如冷却水循环、压缩空气管理、液压油路切换等场景。其紧凑的外形（如G3/4"螺纹连接尺寸87×114mm）和轻量化设计便于集成到复杂管路。对于腐蚀性环境，可选不锈钢阀体版本；高温工况则建议选用耐热密封材料（如EPDM）。产品出厂前经过严格测试，确保长期使用下的稳定性。31519

Product Introduction

The DF-20 Water-Liquid-Gas Solenoid Valve is a pilot-operated general-purpose valve designed for automated control of liquids (water, oil), gases, and low-viscosity media (≤20CST). Its diaphragm-type secondary opening structure ensures high sensitivity and reliability, suitable for rapid on/off control in industrial piping systems. The valve body is available in brass or stainless steel, with flange or threaded connections to accommodate diverse installation requirements. Operating pressure ranges from 0.03 to 0.8MPa, and media temperature tolerance spans -10°C to +75°C. The coil supports multiple AC/DC voltages (e.g., AC220V, DC24V) with B-class insulation and 12W power consumption (for φ5~φ20 models), maintaining stable operation with ≤80°C temperature rise.111

Key Features

Featuring a step-by-step direct-acting mechanism, the DF-20 enables zero-pressure-difference activation, delivering large flow capacity and fast response (≤2 seconds for φ3~φ50 sizes). The rubber sealing structure reduces sensitivity to media purity while enhancing leak-proof performance. Installation requires aligning media flow direction with the valve arrow, keeping the coil upward at a tilt angle below 30° for optimal performance. Both normally closed (power-off closed) and normally open (power-off open) variants are offered for flexible system integration. The valve tolerates power fluctuations within -15%~+10%, adapting to unstable grid conditions.216

Applications

This solenoid valve is widely used in fluid control systems across industries like textiles, chemical processing, food production, and water treatment—applications include cooling water circulation, compressed air management, and hydraulic circuit switching. Its compact dimensions (e.g., 87×114mm for G3/4" thread) and lightweight design facilitate integration into complex pipelines. Stainless steel versions are recommended for corrosive environments, while high-temperature applications may require heat-resistant seals (e.g., EPDM). Rigorous pre-delivery testing ensures long-term operational stability.319

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