DATASHEET SRX/SRT MODULATING VALVE

Product catalog summary

Overview: This document is a datasheet for SRX/SRT modulating angle-seat valves, designed for fluid and steam control up to 187°C. It highlights the technical specifications, features, and available versions of these valves.

Specifications:

Maximum flow control accuracy with a linear shutter opening pattern and parabolic profile shutter.
Feedback module included for enhanced control.
Internal springs designed for high-frequency drive up to 10 million cycles.
Swiveling cylinder that requires no wrench for orientation.
Self-lubricated rod guide to prevent seizure.

Valve Types:

SRX Modulating: Features a stainless steel body, normally closed, with bidirectional flow capability.
SRT Modulating: Available in brass or stainless steel, also normally closed, with similar flow capabilities.

Technical Parameters:

Size range: 1/2" to 2" (PN40-PN16).
Pipe threads: F/F gas ISO228.
Ambient temperature: 0° to +50°C.
Pilot pressure: Min 5.0 bar – Max 7.0 bar.
Power supply: 24 VDC ± 10% with a maximum power input of 6.25 W.
Input and output signal: 4-20 mA.
Accuracy and linearity error: 0.2% full scale.
Hysteresis: Less than 1%.
Protection class: IP65.

Materials:

Valve body: Stainless Steel Aisi 316 or Brass.
Piston: Aluminium.
Cylinder: Anodized aluminium.
Piston rod: Stainless steel Aisi 304.
Shutter seal: PTFE.

Optional Features:

Cylinder surface chemical nickel plating (Niploy process).
FKM or EPDM shutter seal available upon request.

Performance Data: The datasheet includes detailed tables with codes, dimensions, maximum pressure differentials, and flow coefficients (Kv) for various valve sizes and configurations.

Catalog excerpts

MODULATING ANGLE-SEAT VALVE SRX MODULATING/MODULANTE Stainless Steel body / Corpo valvola in acciaio Inox SRT MODULATING/ MODULANTE Brass body / Corpo valvola in ottone Electronic flow modulation Modulazione elettronica del flusso Fluid and steam control up to + 187° C Controllo fluidi e vapore fino a + 187° C Maximum flow control accuracy Massima precisione del controllo del flusso Internal springs designed for high frequency drive up to 10 M cycles* Molle interne progettate per alta frequenza di azionamento fino a 10 M di cicli * Linear shutter opening pattern Apertura otturatore lineare Parabolic profile shutter Otturatore a profilo parabolico Feedback module Modulo di ritorno segnale Swiveling cylinder Cilindro orientabile No wrench needed for cylinder orientation Cilindro orientabile senza uso di chiave inglese Self-lubricated rod guide (seizure prevention) Autolubrificazione guida stelo (prevenzione grippaggio) *based on MAROS engineering's tests test effettuati da MAROS engineering STEAM AND HIGH TEMPERATURE / VAPORE E ALTE TEMPERATURE VALVOLA MODULANTE A SEDE INCLINATA

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Tipe /Tipo Modulating angle seat valve / Valvola modulante a sede inclinata Size / Misure Pipe threads / Attacchi Available versions/ Versioni disponibili Normally Closed (NC) / Normalmente Chiusa (NC) Flow mode /Tipo di flusso Bidirectional flow / Flusso bidirezionale Ambient temperature /Temperatura ambiente Pilot pressure / Pressione pilota Power supply / Alimentazione elettrica Maximum power input / Potenza massima assorbita Input signal / Segnale d’ingresso Output signal / Segnale d’uscita Accuracy / Precisione Linearity error / Errore di linearità Hysteresis / Isteresi Protection class...

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SRX Modulating - NC Closing against flow / SRX Modulante - NC Ingresso fluido sotto otturatore Code Codice Gas pipe thread Filett. (gas) G” NOTE / NOTA * The flow coefficient KV represents the volume flow rate of water passing through the valve under the following conditions: Il coefficiente di portata KV rappresenta la portata in volume di acqua che passa attraverso la valvola alle condizioni seguenti: ∆P = 1 [bar]; T = 5÷40 [°C]; density/densità = 1000 [kg/mᶟ] STEAM AND HIGH TEMPERATURE / VAPORE E

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SRT Modulating - NC Closing against flow / SRT Modulante - NC Ingresso fluido sotto otturatore Code Codice Gas pipe thread Filett. gas G” NOTE / NOTA STEAM AND HIGH TEMPERATURE / VAPORE E ALTE TEMPERATURE * The flow coefficient KV represents the volume flow rate of water passing through the valve under the following conditions: Il coefficiente di portata KV rappresenta la portata in volume di acqua che passa attraverso la valvola alle condizioni seguenti: ∆P = 1 [bar]; T = 5÷40 [°C]; density/densità = 1000 [

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DATASHEET SRX/SRT MODULATING VALVE

DATASHEET SRX/SRT MODULATING VALVE

Catalog excerpts

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