Rate of Flow Control Valve

CONTROL AUTOMATIC RATE OF FLOW

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Rate of Flow Control Valve

DN:50-1000 mm | PN: 10-40 bar

Nahrab pilot automatic control valves are used as control and regulating valves in lines. The operation of these valves is fully automatic and is controlled by the flow and does not require the application of energy from outside. In order to regulate the flow or pressure , a hydraulic circuit with a pressure difference between upstream and downstream of the valve and a regulating valve (pilot) is used, The command circuits of Nahrab control valves are state to the art and made of the best stainless steel and all of its various pilots are also produced by Nahrab Gostar Eshtehard Company. The stainless steel unions and nipple and connector assembly makes it possible to inspect or open and close the valve at any moment and any section without needing to use any sealing trip .

DN: 50 - 50
mm
PN: 10 - 10
Bar

Nahrab piloted automatic control valves are used as control and regulating  valves in pipe lines. The operation of these valves is fully automatic and is controlled by the flow and does not require the application of energy from outside. In order to regulate the flow or pressure, a hydraulic circuit with a pressure difference across the valve and a regulating valve (pilot) is used, The command circuits of Nahrab control valves are state to the art and made of the  best stainless steel and all of its  various pilots  are also produced by Nahrab Gostar Eshtehard Company. using stainless steel unions with a nipple and connector assembly  makes it possible to inspect or open and close the valve at  any moment and any section without the need for a sealing strip (Teflon).

 

Product features and advantages:

  • Easy installation due to the low weight of the valve
  • Flanges: in accordance with (2501 DIN) EN 1092-2
  • Face to face : , according to ( DIN 3202) DIN EN 558-1 Series1) F1
  • Final test of valve in accordance with DIN EN 12266-1

 

Corrosion Protection :

  Electrostatic epoxy powder Coating with a  min thickness  250  , and certified by reputable international  institutions, for potable water

Rate of Flow Control Valve

This valve is   used to limit the maximum flow through the pipeline and keep the flow rate constant regardless of the amount of consumption or pressure changes in the line. The control pilot in this valve is sensitive to minor pressure changes on the sides of the orifice located downstream of the flow, and very small pressure changes cause it to be immediately corrected by the main valve, which indicates the precise control function of the valve.

Spare Parts

Material

Part Name

Part No.

 

Ductile iron) GJS 400-15)*

Body

1

 

Ductile iron) GJS 400-15)*

Cover

2

 

1.4308

Seat

3

1.4301

Stem

4

EPDM or NBR

Sealing Ring

5

 

Ductile iron) GJS 400-15)

Disc

6

EPDM or NBR

Diaphragm

7

 

Ductile iron(GJS 400-15) or Al.Bz

Diaphragm Washer

8

1.4310 | 1.4301

Spring

9

 

1.4308

Disc Guide

10

A2

Stem Nut

11

1.4310 | Bronze

Cover Bearing

12

EPDM or NBR

Seat O-Ring

13

 

A2) 10inch and Larger)

Stud

14

 

A2

Hex Nut (10” and Larger)

15

A2

Pipe Plug

16

PTFE

Spacer Washer

17

 

A2

Cover Bolt (6” and Smaller)

18

They can also be produced with stainless steel or cast steel (WCB) as request

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