StoneL Explosion-proof Limit Switch, AX Series
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Axiom AX Series Explosion-Proof Limit Switch

Brand: Valmet
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StoneL Explosion-proof Limit Switch, AX Series
The Axiom explosionproof platform, available in epoxy-coated anodized aluminum or stainless steel, will withstand your most challenging plant environments.

It features advanced position monitoring and integral pneumatic control.
Features
  • Universal burn out proof solenoid operates on less than 0.6 watts of power and standard version will accept 24 Vdc or 120 Vac, reducing stocking requirements
  • Prefiltered pilot valve provides additional protection from contaminants
  • Integral pneumatic valve operates on standard plant air, will cycle most actuators in less than two seconds, and is modularized for easy clean out if fouling occurs
  • Standard 5-way, 2-position valve operates both single- and double-acting actuators and features a standard rebreather to feed instrument air into spring side of actuator to keep out corrosives
  • Electronic components are sealed and potted inside function module to protect against residual moisture, vibration, and corrosives
  • No bushings or shafts will wear out. Electronic module, with magnetically driven position sensor, is fully isolated from the outside environment. Actuator wear causing shaft “wobble” will not affect monitoring performance

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Specifications

Brand

Accuracy

  • Expeditor Intermediate Control Accuracy: ± 3° of Rotation
  • Expeditor Position Monitoring Accuracy: ± 1° of Rotation
  • HART with Diagnostics Pressure Accuracy: ± 1 % of Full Scale
  • Position Sensor System Accuracy: within 1°

Actuator Type

  • Double-Acting
  • Single-Acting

Approvals & Certifications

  • ATEX II 2 G Ex d IIC T4/T5/T6 Gb IP66/67
  • CE 1725
  • FM Class I, Div. 1, Groups B, C, D & Class II, Div. 1, Groups E, F, G
  • IEC 61508 Parts 1-7: 2010 & IEC 61511-1: 2003 + Corr. 1: 2004
  • IEC Ex d IIC T4/T5/T6 Gb IP66/67
  • INMETRO Ex d IIC T6 to T4 Gb
  • TR CU 1Ex d IIC T4/T5/T6 Gb x  IP66/67

Cap Material

  • 316 Stainless Steel

Conduit Connection

  • 3/4” NPT
  • M25

Configuration

  • 2-Wire Solid State Switches
  • 4-20 mA
  • Auxiliary Discrete Input
  • Discrete Position Sensor Input
  • Discrete Sensor Input
  • Dual Pilot
  • Low Air Supply Pressure Input
  • Modified Output Block
  • Multiple DI/DO Blocks
  • Parameter Bit Spring
  • Peripheral Fault Bit
  • Power Output
  • Remote Sensor Setting
  • Single Pilot
  • Solenoid Power Input
  • Stuck Valve/Actuator Input
  • Wink Feature

Current

  • HART with Diagnostics Current Output: 4-20 mA
  • NAMUR Sensor Current Rating: Target Off I > 2.1 mA
  • NAMUR Sensor Current Rating: Target on I < 1.0 mA
  • Stainless Steel Sensor 33 & 35 Min. on Current: 2 mA
  • Stainless Steel Sensor 33 & 35, Max.

Deadband

  • 6° from Set Point - Rotational Distance from Original Set Point where Switch Will De-Energize

Display

  • LEDs

Electrical Rating

  • Piezo Pilot Electrical Rating (_A Option): 2 mA at 6.5 Vdc
  • Solenoid Pilot Electrical Rating (_D Option): 0.5 W at 24 Vdc
  • Solenoid Pilot Electrical Rating (_E Option): 0.5 W at 12 Vdc (Intrinsically Safe)
  • Solenoid Pilot Electrical Rating (_H Option): 0.6 W at 22-250 Vac/Vdc

Enclosure, Body Material

  • Enclosure & Manifold / Mounting Plate: Epoxy Coated Anodized Aluminum
  • Enclosure & Manifold / Mounting Plate: Stainless Steel

Environmental Protection

  • IP66
  • NEMA 4
  • NEMA 4X

Filter

  • Piezo Pilot Filtration Requirements: Dried / 30 micron
  • Pneumatic Valves & Solenoid Pilot Filtration Requirement: 40 micron (Piezo, 30 micron)

Input

  • Expeditor Position Feedback Control (Analog Input): 4-20 mA Loop
  • Expeditor Position Feedback Control (Analog Input): 9-35 Vdc
  • Stainless Steel Sensor 33 Solenoid Input: 22-130 Vac/Vdc
  • Stainless Steel Sensor 35 Solenoid Input: 20-250 Vac
  • Stainless Steel Sensor 35 Solenoid Input: 20-60 Vdc
  • VCT with Extended Addressing Auxiliary Input: 24 Vdc at 2 mA (Self-Powered)

Loop Resistance

  • HART with Diagnostics Loop Resistance: 250 ohms (Min) to 400 ohms, Max.

Materials of Construction

  • Pneumatic Valve Spool (Stainless Steel Enclosure): Nickel-Plated Teflon Coated Stainless Steel
  • Pneumatic Valve Spool Seals (Aluminum Enclosure): Nitrile Compound
  • Visual Indicator Lens: Lexan Polycarbonate

Maximum Current

  • Stainless Steel Sensor 33 & 35, Max.
  • VCT with Diagnostics, Max.
  • VCT with Extended Addressing, Max.
  • VCT, Max.

Mounting

  • 316 Stainless Steel
  • NAMUR VDI/VDE 3845

O-Ring Material

  • Nitrile

Operating Pressure

  • psi: 40 to 120 (kPa: 275.8 to 827.4, bar: 2.8 to 8.3)

Operating Temperature

  • Piezo Pilot Operating Temperature: -10° to 60° C (14° to 140° F)
  • Solenoid Pilot Operating Temperature Extended (0.7 CV): -40° to 80° C (-40° to 176° F)
  • Solenoid Pilot Operating Temperature Standard (0.7 CV): -18° to 50° C (0° to 122° F)
  • Solenoid Pilot Operating Temperature Standard (1.2 CV): -10° to 50° C (14° to 122° F)

Operation

  • NAMUR Sensor Operation: Normally Closed (Solid State)
  • Stainless Steel Sensor 33 & 35 Operation: Normally Open (Solid State)

Output

  • 4 W at 24 Vdc
  • Expeditor Intermediate Position Control (Analog Output): 4-20 mA Loop
  • Expeditor Intermediate Position Control (Analog Output): 9-35 Vdc
  • VCT Bus Powered Output: 2 mA at 6.5 Vdc Each, Current Limited to 2 mA (Bus Powered)
  • VCT with Diagnostics Output, Voltage: 24 Vdc
  • VCT with Diagnostics Output: 0.5 W at 24 Vdc
  • VCT with Extended Addressing Output: 2 W at 24 Vdc

Override

  • External Latching
  • External Momentary
  • Internal Momentary Standard

Port

  • 1/4” NPT
  • 3/8”

Power

  • 0.02 A at 24 Vdc
  • 0.04 A at 12 Vdc

Range

  • NAMUR Sensor Voltage Range: 7-24 Vdc
  • Stainless Steel Sensor 33 Voltage Range: 20-125 Vac / 125 Vdc

Rating

  • 0.70 CV
  • 1.2 CV

Repeatability

  • 1°

Rotation

  • 120°

Seat / Seal Material

  • Nitrile
  • Polysulfone

Set Point Range

  • 4° from Set Point - Rotational Distance from Original Set Point where Switch Will Energize on Return Stroke

Supply Pressure

  • psi: 40 to 120 (kPa: 275.8 to 827.4, bar: 2.7 to 8.2)

Temperature Range

  • Expeditor Temperature Rating (Extended): -20° to 80° C (-4° to 176° F)
  • Expeditor Temperature Rating (Standard): -18° to 50° C (0° to 122° F)

Voltage

  • 21-26 Vdc
  • 24 Vdc
  • Expeditor Solenoid Voltage (Intrinsic Safety Models): 12 Vdc
  • HART with Diagnostics Voltage: 14-35 Vdc (24 Vdc Nominal)
  • Stainless Steel Sensor 35 Voltage Range: 20-250 Vac
  • Stainless Steel Sensor 35 Voltage Range: 8-250 Vdc

Voltage Drop

  • Stainless Steel Sensor 33 & 35, Max.

Documentation

Data Sheets

Certifications & Approvals

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