IndiTech Valves Pvt. Ltd.Values ‘n’ Valves

CONTINUOUS &INTERMITTENTBLOWDOWN VALVESSERIES 320Ver 1.1 (2014)

The primary function of a blowdown valve is to control the concentrations of suspended and total dissolved solids (TDS) in the boiler. Continuous Blowdown (CBD) valves are designed to operate in continuous open position by releasing water continuously, whereas Intermittent Blowdown (IBD) valves are designed to operate at predetermined intervals by releasing water and accumulated sludge periodically. Boiler blowdown is a severe service application owing to the high pressure drop in flashing water which results in rapid erosion and wearing out of conventional valves.

Introduction

? - Ensures that the blowdown valve is practically entirely self-draining.? - CBD has single step venturi diffuser, whereas IBD has multi step

pressure reducing trim.? - Eliminates body-bonnet leakage at high pressures.? - Provides maximum resistance against erosion, wire-drawing and

ensures long service life.? - Eliminates problem of vibration and chatter.? - Maintains tight seal even at high temperatures.? - Ensures minimum friction and zero gland leakage.? - Facilitated by provision of back seat.? - Made possible by the modular design.

Angle type designSeparate trim for CBD and IBD

Pressure seal bonnet for ANSI #1500 and #2500Stellited plug-spindle and seat

Integral plug-spindleExtra-long gland packingRoller burnished plug-spindleOnline maintenance of gland packingQuick and easy installation, dismantling and maintenance

Features

SizePressure RatingEnd ConnectionsBody MaterialOperationOrifice SizeBonnetTypes

1 1 ½" / 2" / 2 NB ANSI #300 / #600 / #900 / #1500 / #2500Flanged / Socket Weld / Butt WeldA105 / A182 F11 / A182 F22Manual / Motorized1/8" / 3/16" / 1/4" / 5/16" / 3/8" / 7/16" / 1/2"/ 5/8" / 3/4" / 7/8" / 1"Standard Bolted / Pressure Seal320-C, Continuous Blowdown Valve320-I, Intermittent Blowdown Valve

" / ½" / 3"

Technical Data

IndiTech reserves the right to change product designs and specifications without notice.

CBD (320-C)Single Step Trim

IBD (320-I)Multi Step Trim

1 2 3 4 10 20 30 40 100 150 200 221

0.1

0.2

0.3

0.4

1

2

3

4

10

20

30

40

100

1/8"

3/16"

1/4"

5/16"

3/8"7/16"1/2"

5/8"

3/4"

7/8"

1"

Orif

ice

Size

(inc

h)

0.05

0.5

5

50

0.5 5 50

Blow

dow

n Ca

paci

ty (T

PH)

Boiler Pressure (bar)

Flow Rate Chart for Continuous Blowdown Valve

9

46

2

10

7

13

5

12

11

31

8

Series 320 Blowdown Valve

Flow Rate Chart for Intermittent Blowdown Valve

2 3 4 5 20 30 40 50 200 221

5

2

3

4

20

30

40

50

Kv = 1

Kv = 2

Kv = 3

Kv = 4

Kv = 6

Kv = 8

Kv = 10

1

10

100

1 10 100

Blow

dow

n Ca

paci

ty (T

PH)

Boiler Pressure (bar)

Sr. No. Part Name Material1 Valve Body A105 / A182 F11 / A182 F222 Seat SS 316 Stellited3 Plug - Spindle SS431 Stellited4 Gasket Graphite + SS 3165 Bonnet A105 / A182 F11 / A182 F22 Stellited6 Guide Bush SS 4317 Gland Packing Graphite8 Gland Follower SS 4319 Gland Flange Carbon Steel10 Stud - Nut A193 B7-Gr. 811 Support Carbon Steel12 R/L Sleeve Carbon Steel13 Actuator / Manual Assy. -

Parts list will vary for pressure seal bonnet valve.

IndiTech Valves Pvt. Ltd.

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