Product Overview

The Danfoss EV220B series represents the most versatile and robust solenoid valve program in the industrial automation sector. Designed as a 2/2-way pilot-operated valve, the EV220B excels in regulating a wide variety of media, including water, oil, compressed air, and similar neutral fluids. Its servo-controlled mechanism allows for reliable operation across high-pressure differentials while maintaining low energy consumption. Unlike standard valves that suffer from water hammer, the EV220B integrates a built-in pilot filter and a damping system that significantly reduces noise and vibration during the closing phase. This makes it an essential component for heavy-duty industrial applications, from cooling systems and laundry equipment to large-scale irrigation and heating networks where durability and precision are non-negotiable.

Core Technical Advantages

Anti-Water Hammer Design

The valve internal geometry features a specifically designed diaphragm and pilot orifice that slow down the final closing movement. This dampening effect prevents the destructive pressure surges known as water hammer, shielding your piping infrastructure, sensors, and pumps from mechanical fatigue and sudden failure.

Pilot Filter Protection

To ensure operational longevity in less-than-perfect fluid conditions, the EV220B incorporates a self-cleaning pilot filter. This protective mesh prevents debris from clogging the sensitive pilot orifice, drastically reducing maintenance intervals and preventing "stuck-open" or "stuck-closed" failures common in lower-tier valve designs.

Interchangeable Coil System

The hardware architecture utilizes a modular "clip-on" coil system. This allows maintenance teams to swap coils (AC or DC) or replace damaged electrical components without depressurizing the fluid line or removing the valve body. This flexibility ensures the EV220B adapts easily to various international voltage standards in global machine exports.

Technical Specifications

Engineering Installation Guide

Flow Direction and Orientation

Always install the valve with the arrow on the body pointing in the direction of the fluid flow. While the EV220B functions in any orientation, we recommend mounting the coil in the upright position. This prevents the accumulation of sediment in the armature tube, which can lead to sluggish response or coil overheating.

Strainer Requirement

Despite the built-in pilot filter, we strongly advise installing an external Y-strainer (50-100 micron) upstream of the valve. This extra layer of protection captures larger particulates, ensuring the main diaphragm seal remains airtight and preventing premature wear on the internal seating surfaces.

Coil Mounting and Electrical Safety

Before energizing the valve, ensure the coil is securely snapped onto the armature. Never apply power to a coil that is not mounted on the valve body, as the lack of a magnetic core will cause the coil to overheat and burn out within seconds. Ensure the cable entry points are sealed correctly to maintain the IP rating in washdown environments.

Engineering Advantages

The EV220B excels in extreme environments where high duty cycles are the norm. The use of Dezincification Resistant (DZR) brass in specific variants protects the valve against corrosive water types, while the stainless steel options satisfy the hygiene requirements of the food and chemical sectors. The valve’s "soft-closing" characteristic is particularly valued in high-flow systems where sudden shut-offs could damage sensitive pressure transducers or flow meters. By standardizing on the EV220B, procurement managers benefit from a globally recognized platform with readily available spare part kits (diaphragms and armatures), ensuring that any localized wear does not lead to prolonged production downtime.

Delivery & Logistics

Delivery Time: 3-5 days once payment is finalized.

Shipping Carriers: Shipped globally via DHL, FEDEX, or UPS.

Packaging: We utilize impact-resistant, moisture-proof packaging for all solenoid valve shipments. Every EV220B is delivered in its original factory-sealed box to guarantee the mechanical and electrical components arrive in perfect industrial condition.

Technical FAQs

Q1: What seal material should I choose for my application?

A1: Use EPDM for water and steam (up to 140°C), NBR for compressed air and oil, and FKM for high-temperature oil or chemical applications. Selecting the correct seal is vital for chemical compatibility and lifespan.

Q2: Does the EV220B require a minimum differential pressure to operate?

A2: Yes, as a pilot-operated valve, it requires a minimum differential pressure (usually 0.1 to 0.3 bar) to lift the diaphragm. For zero-pressure applications, please consult us about the EV210B (direct-acting) or EV250B (assisted lift) series.

Q3: Can I use this valve for vacuum applications?

A3: The EV220B is primarily designed for positive pressure systems. For vacuum control, specific modifications or different valve series are typically required to ensure a perfect seal against atmospheric pressure.

Q4: Is the coil included with the valve body?

A4: Depending on the ordering code, valves may be sold as "Body Only" or with a pre-selected coil. We stock a full range of AC and DC coils to match your specific control voltage requirements.