ASCO 551 Brass Valves | Ex m Encapsulated ATEX IECEx Solenoid Valves NAMUR (PV)

Product Overview

ASCO 551 namur solenoid Valve

ASCO 551 Ex m encapsulated valves for use in potentially explosive atmospheres – in accordance with explosion protection concept type Ex m (Encapsulation). This series of solenoid valve operators are manufactured and certified for hazardous area use according to ATEX, IECEx and IEC regulations.

The monostable spool valves are manufactured and certified for hazardous area use according to IEC 61508 Standard (2010 route 2H version) and are TÜV certified with integrity levels: SIL 2 for HFT = 0 / SIL 3 for HFT = 1.

They are single/dual solenoid valves (mono/bistable), which are pilot operated spool type valves with a brass body and are 1/4 tapped.

features

• The 3/2 NC & 5/2 NAMUR style spool solenoid valves have threaded port connections
• In order to provide better environmental protection against the ingress of liquids, dusts and other foreign matter, all of the exhaust ports are connectable. This is particularly recommended for sensitive areas, such as clean rooms, and applications within the pharmaceutical and food processing sectors
• The Ex m Encapsulated solenoid valves can be externally piloted via an external air pilot supply, in order to convert the valve to zero minimum operation by flipping a gasket
• The solenoid valves can be mounted in any position without affecting operation
• Threaded pipe connection identifier is 8 = NPT (ANSI 1.20.3); G = G (ISO 228/1)
• Coil insulation class: F
• Electrical safety: IEC 335
• Standard voltages: DC (=) 24V – 48V | AC (~) 24V – 48V – 115V – 230V/50Hz; and 60Hz (other voltages are available on request)

specification

Differential Pressure: 2 – 10,4 bar [1 bar =100 kPa]
Flow (Qv at 6 bar): 700 l/min
Fluids: air, inert gas, filtered
Temperature Range: -40°C to +60°C
Seal Materials: VMQ (silicone) + PUR (polyurethane)

asco 551 valves – dimensions

Type ASCO 551 3/2 NC & 5/2 NAMUR Brass

Solenoids

Ordering Information: A solenoid valve with the explosion proof operator will be identified with the prefix ASCO PV before the catalogue number.

For example

ASCO PV E 210D095 230V/50Hz

Where:

• PV Solenoid Operator
• E Pipe Thread
• 210D095 Solenoid Valve | Operator Catalogue Number
• 230V Voltage

A valve supplied with the explosion proof operator will be identified with electrical interface A7 in the 15-digit product code.

For example

ASCO E 262 K 232 A7 V00 H1

Where:

• E Thread Connection
• 262 ASCO Solenoid Valve Series
• K Revision Letter
• 232 ASCO Solenoid Valves Version
• A7 Electrical Interface
• V00 Valves | Operators Options
• H1 Voltage Class

Explanation of Temperature Ranges of Solenoid Valves

• Valve Temperature Range – the valve temperature range (TS) is determined by the selected seal material, the temperature range for proper operation of the solenoid valve and sometimes by the fluid (e.g. steam).
• Valve Operator Ambient Temperature Range – the operator ambient temperature range is determined by the selected power level and the safety code.
• Total Temperature Range – the temperature range of the complete solenoid valve is determined by the limitations of both temperature ranges above.

Electrical Connections for Solenoid Valves

The following information displays the electrical connection options available for this range of explosion proof solenoid valves manufactured by ASCO:

Additional options

• Valves configured for external pilot air supply, TPL 20547
• Other pipe threads are available on request
• Ex mb/mD (prefix “PV”) solenoid can be supplied with various cable lengths
• Compliance with “UL”, “CSA” and other local approvals available on request