Euro Flow Control
A204 Pressure Reducing Valve with Flow Limiter15 of 30 control valvesA206 Pressure Reducing Solenoid Control Valve
Control Valve
Part of the A900 modular system

A205 Pressure Sustaining and Reducing Valve

Datasheet

Download datasheet (PDF)

Specifications are indicative. Final specification is confirmed at quotation.

Specifications

Confirmed at quote
Size Range
DN50 to DN800
Pressure Class
PN10, PN16, PN25
End connection
Flanged
Operating temperature
-10°C to 80°C

Standards

Design & manufacture
EN 1074-5, BS EN 1074-5
Inspection & test
ISO 5208, BS EN 12266-1
Face to face
BS EN 558-1

Configure your variant(manually adjust box on the right if you require a different spec)

Size
Pressure
End connection

Materials

All available material options per part. Click a pill to set it in the configurator.

Body
Bonnet
Seat
Stem
O-Ring
Spring
Bolt
Bush
Cap
Caulking Nut
Diaphragm
Disc Holder
Eye Bolts
Fix Washer
Fixing Holder
Pilot Reducing Adjusting Screw
Pilot Reducing Body
Pilot Reducing Bonnet
Pilot Reducing Cap
Pilot Reducing Diaphragm
Pilot Reducing Disc
Pilot Reducing Fixing Holder
Pilot Reducing Jam Nut
Pilot Reducing Nut
Pilot Reducing O Ring
Pilot Reducing Plug
Pilot Reducing Screw
Pilot Reducing Spring
Pilot Reducing Spring Table
Pilot Reducing Yoke
Pilot Sustaining Adjusting Screw
Pilot Sustaining Body
Pilot Sustaining Bonnet
Pilot Sustaining Cap
Pilot Sustaining Diaphragm
Pilot Sustaining Disc
Pilot Sustaining Fixing Holder
Pilot Sustaining Gasket
Pilot Sustaining Internal Body
Pilot Sustaining Jam Nut
Pilot Sustaining Nut
Pilot Sustaining O Ring
Pilot Sustaining Screw
Pilot Sustaining Spring
Pilot Sustaining Spring Table
Pilot Sustaining Stem
Plug
Screw
Seal
Seal Retainer
Seat Retainer
Washer

Pressure-temperature rating

Maximum working pressure at each temperature, per pressure class.

ClassPressureMin tempMax temp
PN1010 bar-10°C80°C
PN1616 bar-10°C80°C
PN2525 bar-10°C80°C
Dimensions per size(16 sizes)
SizeL (mm)H (mm)PN10 OD (mm)PN16 OD (mm)PN25 OD (mm)PN10 OK (mm)PN16 OK (mm)PN25 OK (mm)PN10 OB (mm)PN16 OB (mm)PN25 OB (mm)PN10 N-Od (mm)PN16 N-Od (mm)PN25 N-Od (mm)Weight
DN502301771651651651251251259999994-Ø194-Ø194-Ø19
—
DN652902021851851851451451451181181184-Ø194-Ø198-Ø19
—
DN803102192002002001601601601321321328-Ø198-Ø198-Ø19
—
DN1003502432202202351801801901561561568-Ø198-Ø198-Ø23
—
DN1254002432502502702102102201561561568-Ø198-Ø198-Ø28
—
DN1504803332852853002402402502112112118-Ø238-Ø238-Ø28
—
DN2006004283403403602952953102662662748-Ø2312-Ø2312-Ø28
—
DN25073047840540542535035537031931933012-Ø2312-Ø2812-Ø31
—
DN30085053846046048540041043037037038912-Ø2312-Ø2816-Ø31
—
DN35098055052052055546047049042942944816-Ø2316-Ø2816-Ø34
—
DN400110071058058062051552555048048050316-Ø2816-Ø3116-Ø37
—
DN450120072064064067056558560053054854820-Ø2820-Ø3120-Ø37
—
DN500125082271571573062065066058260960920-Ø2820-Ø3420-Ø37
—
DN600145088584084084572577077068272072020-Ø3120-Ø3720-Ø40
—
DN700165091091091096084084087568272072024-Ø3124-Ø3724-Ø43
—
DN8001850126010251025108595095099090190192824-Ø3424-Ø4024-Ø49
—
Technical drawings(3 pages)

Operating media

Water

Typical applications

  • Pressure zone boundaries
  • Shared transmission mains
  • Reservoir inlets
  • Bulk supply metering

Approvals

WRASISO 9001

Features

  • The A205 combines pressure reduction with pressure sustaining in a single valve
  • The PRV pilot reduces downstream pressure to the set value while the sustaining pilot ensures upstream pressure does not fall below a minimum threshold
  • When demand is high and upstream pressure approaches the sustaining set point, the sustaining pilot takes control to protect the upstream supply
  • Used where one transmission main serves multiple zones with differing supply commitments

Description

The A205 combines pressure reducing and pressure sustaining in a single A900 valve body, using a P200 reducing pilot and P500 sustaining pilot. The P200 reduces downstream pressure to the set value under normal conditions; the P500 takes control when demand is high and upstream pressure approaches the sustaining threshold, protecting the upstream supply. Used where one transmission main serves multiple zones with differing pressure commitments.

Selection notes

This control valve is supplied for flanged installation.

Sizes run DN50 to DN800, in PN10, PN16, PN25.

The body is EN-GJS-500-7.

Seat and trim options are AISI 304 and 316. The seat, not the body, usually sets the temperature and medium limit, so confirm it against the service before ordering.

Stated service media include water.

It is catalogued for Water & Wastewater.

Working temperature is -10°C to 80°C.

Built to EN 1074-5, BS EN 1074-5, BS EN 558-1, ISO 5208 and BS EN 12266-1.

Supplier remarks

  • A205 piping arrangement: main valve, needle valve, P500 sustaining pilot, P200 reducing pilot, ball valve, optional inlet/outlet pressure gauges, strainer.

Available pressure classes

Pressure classes this product is rated to.

PN10PN16PN25

Used in

Water & Wastewater

Related guides

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A900 configurations

View full A900 system →
This product is part of the A900 modular system. All configurations share the same hydraulically operated body: the control function is set by the pilot valve(s) attached. An existing A900 body in the field can be reconfigured for a different duty simply by swapping the pilot, without replacing the body.

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DN50 to DN800

A200 Pressure Reducing Valve

DN50 to DN800

A203 Pressure Reducing with Check Valve

DN50 to DN800

A300 Slow Control Check Valve

DN50 to DN800

A400 Flow Control Valve

DN50 to DN800

A500 Pressure Relief / Sustaining Valve

DN50 to DN800

A600 Solenoid Control Valve

DN50 to DN800

A76D Pump Control Valve - Double Chamber

DN50 to DN800

A900 Automatic Control Valve (Main Valve)

DN50 to DN1000

A10A Altitude Control Valve

DN50 to DN800

A10B Bi-Level Float Control Valve

DN50 to DN800

A14A Altitude with Rate of Flow Control Valve

DN50 to DN1000

A204 Pressure Reducing Valve with Flow Limiter

DN50 to DN1000

A206 Pressure Reducing Solenoid Control Valve

DN50 to DN800

A20B Pressure Reducing Valve + Low Flow Rate Bypass

DN50 to DN200

A2A5 Surge Anticipating Control Valve

DN50 to DN800

A506 Pressure Sustaining Valve with Solenoid Control

DN50 to DN800

A6DV Dual Solenoid Control Valve

DN50 to DN300

A7MD Pump Control Valve - Passive Protection

DN50 to DN800

A800 Pressure Differential Valve

DN50 to DN800

A900 Automatic Control Valve - Threaded

DN40 to DN50

R900 Main Valve - Reduced Bore

DN80 to DN1000

Pilot assembly & accessories

Pilot assembly

P200 Reducing Pilot

Reducing pilot: maintains downstream pressure at the pre-set value

P500 Relief / Sustaining Pilot

Sustaining pilot: prevents upstream pressure falling below the minimum threshold when demand is high

Compatible accessories

Needle Valve

Adjusts response speed and damps oscillation in the pilot circuit

Related Control Valves

A100 Modulating Float Control Valve
Control ValveREF 344

A100 Modulating Float Control Valve

Type
Control Valve
Size
DN50 to DN800
Pressure
PN10, PN16, PN25
Body
EN-GJS-500-7
Standards
EN 1074-5, BS EN 1074-5
Add variant details

Adds to your quote request, not a purchase. Refine size, pressure and material before submitting.

A200 Pressure Reducing ValveControl ValveREF 345

A200 Pressure Reducing Valve

Type
Control Valve
Size
DN50 to DN800
Pressure
PN10, PN16, PN25
Body
EN-GJS-500-7
Standards
EN 1074-5, BS EN 1074-5
Add variant details

Adds to your quote request, not a purchase. Refine size, pressure and material before submitting.

A203 Pressure Reducing with Check ValveControl ValveREF 346

A203 Pressure Reducing with Check Valve

Type
Control Valve
Size
DN50 to DN800
Pressure
PN10, PN16, PN25
Body
EN-GJS-500-7
Standards
BS EN 1074-5, BS EN 558-1
Add variant details

Adds to your quote request, not a purchase. Refine size, pressure and material before submitting.

A300 Slow Control Check ValveControl ValveREF 347

A300 Slow Control Check Valve

Type
Control Valve
Size
DN50 to DN800
Pressure
PN10, PN16, PN25
Body
EN-GJS-500-7
Standards
EN 1074-5, BS EN 1074-5
Add variant details

Adds to your quote request, not a purchase. Refine size, pressure and material before submitting.