Euro Flow Control
A7MD Pump Control Valve - Passive Protection22 of 30 control valvesA900 Automatic Control Valve - Threaded
Control Valve
Part of the A900 modular system

A800 Pressure Differential 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
Bolts
Bush
Cap
Diaphragm
Disc Holder
Eye Bolts
Fix Washer
Fixing Holder
Pilot P800
Plug
Seal
Seal Retainer
Seat Retainer
Washers

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)OD PN10 (mm)OD PN16 (mm)OD PN25 (mm)OK PN10 (mm)OK PN16 (mm)OK PN25 (mm)N-Od PN10 (mm)N-Od PN16 (mm)N-Od PN25 (mm)OB PN10 (mm)OB PN16 (mm)OB PN25 (mm)Model CodeWeight
DN502301771651651651251251254-Ø194-Ø194-Ø19999999A900-0050
—
DN652902021851851851451451454-Ø194-Ø198-Ø19118118118A900-0065
—
DN803102192002002001601601608-Ø198-Ø198-Ø19132132132A900-0080
—
DN1003502432202202351801801908-Ø198-Ø198-Ø23156156156A900-0100
—
DN1254002432502502702102102208-Ø198-Ø198-Ø28156156156A900-0125
—
DN1504803332852853002402402508-Ø238-Ø238-Ø28211211211A900-0150
—
DN2006004283403403602952953108-Ø2312-Ø2312-Ø28266266274A900-0200
—
DN25073047840540542535035537012-Ø2312-Ø2812-Ø31319319330A900-0250
—
DN30085053846046048540041043012-Ø2312-Ø2816-Ø31370370389A900-0300
—
DN35098055052052055546047049016-Ø2316-Ø2816-Ø34429429448A900-0350
—
DN400110071058058062051552555016-Ø2816-Ø3116-Ø37480480503A900-0400
—
DN450120072064064067056558560020-Ø2820-Ø3120-Ø37530548548A900-0450
—
DN500125082271571573062065066020-Ø2820-Ø3420-Ø37582609609A900-0500
—
DN600145088584084084572577077020-Ø3120-Ø3720-Ø40682720720A900-0600
—
DN700165091091091096084084087524-Ø3124-Ø3724-Ø43682720720A900-0700
—
DN8001850126010251025108595095099024-Ø3424-Ø4024-Ø49901901928A900-0800
—

* DN125 and DN350 use the same internals as DN100 and DN300 respectively.

* DN450 and DN700 use the same internals as DN400 and DN600 respectively.

* AISI 304 is the factory standard stainless steel grade; consult the factory for AISI 316.

Technical drawings(2 pages)

Operating media

Water

Typical applications

  • Differential pressure control
  • Heating networks
  • Building services
  • Industrial water loops

Approvals

WRASISO 9001

Features

  • The A800 pressure differential valve maintains a constant differential pressure between two sensing points in a pipeline or loop
  • Hydraulic pilots sense pressure at both points and modulate the main valve to keep the differential at the set value
  • Used in heating and cooling networks, building services and industrial water systems to ensure stable flow distribution across multiple branches

Description

The A800 is a pressure differential configuration of the A900 main valve body, fitted with a P20A differential pressure pilot. The pilot senses pressure at two points in a pipeline or loop and modulates the main valve to maintain a constant differential between them. Used in heating and cooling networks, building services and industrial water systems to ensure stable flow distribution across multiple branches. An Alpine orifice plate can be used to provide the differential pressure sensing signal.

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 and HVAC.

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

  • Piping arrangement: main valve, needle valve, P800 differential pilot, ball valve, optional inlet/outlet pressure gauges, strainer. Function per source: keeps the pressure difference between supply and return pipe in an HVAC system, equivalent to a balancing valve.

Available pressure classes

Pressure classes this product is rated to.

PN10PN16PN25

Used in

Water & WastewaterHVAC

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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Pilot assembly & accessories

Pilot assembly

P20A Differential Pressure Pilot

Differential pressure sensing pilot: senses pressure at two points and modulates the main valve to hold the set differential

Compatible accessories

Needle Valve

Adjusts response speed and damps oscillation in the pilot circuit

Alpine Orifice Plate

Creates differential pressure signal for flow measurement

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Body
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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.

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Body
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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.

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Size
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Pressure
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Standards
BS EN 1074-5, BS EN 558-1
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Adds to your quote request, not a purchase. Refine size, pressure and material before submitting.

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Standards
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Add variant details

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