catalog (spray vavle)

SPRAY VAVLE

Plant Engineering Solution & Service Corporation

Double spring

Spray

Valve

PESSCO CO., LTD.

ISO 9001:2008 Certificated

A

M

ACCREDITED

T

DSV is patented item.

(Reg. No. 10-0423264)

SPRAY VALVE Double spring Spray Valve

PESSCO

Plant Engineering Solution & Service CorporationRm.617, Byucksan Digital Valley, Gamjeon-Dong, Sasang-Gu, Busan, KOREA.

TEL

FAX

:

:

+82-51-329-7145

+82-51-329-7155

Web

E-mail

:

:

www.pessco.com

[email protected]

1

According to...

the report of spray nozzle troubles in the deaerator of power

plants, the tilting of the valve disc due to perpendicular flow

impingement causes undue ware on disc and seat as well

as non-uniform flow distribution and noise.

Now, after doing our best to solve these problems,

PESSCO has developed DSV (Double spring Spray Valve)

based on the following design concepts.

For additional technical information or

applications engineering assistance,

please contact www.pessco.com.

1st Conical-parabolic shaped DISC minimizes or prevents

the perpendicular flow impingement and insures uniform

spray pattern.

2nd

Double spring control sudden movement of DISC

due to operation mode changes therefore can prevent

undue wear on DISC and noise.

3rd

4th

5th

6th

7th

8th

Streamlined Leg sections attached to the seat

prevent non-uniform spray pattern broken at the three

points.

DISC manufactured by pressing work minimizes thick-

ness reduction compared to spinning work.

Movable Non-binding Teflon Sleeve minimizes

frictional resistance and maximizes trouble-free life.

Double spring made of Stainless Steel Grade 631J1

because of its standing heat property for high

temperature.

Double spring provides two support points of the

STEM, top and bottom.

New BODY design minimizes fluid flow resistance

through the adapter pipe.

Provides...

Flexible Installation

and Best Spray Pattern

▀ DSV is... ▄

DSVs are in stock for immediate delivery.

http://www.pessco.com

mailto:[email protected]


PESSCO


TEL

FAX

:

:

+82-51-329-7145

+82-51-329-7155

Web

E-mail

:

:

www.pessco.com

[email protected]

2

▀ MAJOR FEATURES ▄

DSVs are constructed of Stainless Steel 316.

Each valve is furnished and secured with a

Teflon Gasket and Elastic Stop Nuts, so no

special tool is required for installation and

removal.

However, it is noted that the Elastic Stop Nut

and Lock Nut are not reusable after removal and

should be replaced with new one.

DSV can be used as a direct replacement for

spray nozzles in all Deaerators. The two-bolting

configuration makes installation and replacement

fast and easy.

DSV comes into the world with the following

features and provides high performance over-

coming the weaknesses of conventional spray

nozzles.

DSV produces a uniform, thin conical hollow

spray pattern under the wide range of flow rates

and rapid load changes.

Unlike the conventional spray nozzle designs,

the valve disc maintains a 60° spray angle when

installed on the slant.

The resulting uniform spray pattern of DSV

provides design flexibility of pipe header and is

ideal for instantaneous heating in deaeration.

STAINLESS STEEL STEM manufactured with drawing process.

NON-BINDING TEFLON SLEEVE minimizes friction between BODY

and STEM during normal operating movement of stem and prevents

tilting of the valve disc when installed on the slant.

INNER & OUTER SPRINGS control sudden movement of DISC

under the operation mode changes and provides two support points

of STEM to prevent undue wear on disc.

GASKET RETAINING RING which firmly secures

Teflon Gasket to prevent slip and by pass leakage.

CAST BODY with bolted in design for easy maintenance

and replacement minimizes fluid flow resistance through

the 3 inch adapter pipe.

CONICAL PARABOLIC SHAPED DISC minimizes or prevents

the perpendicular flow impingement and insures uniform spray pattern.




PESSCO


TEL

FAX

:

:

+82-51-329-7145

+82-51-329-7155

Web

E-mail

:

:

www.pessco.com

[email protected]

3

MINIMUM

DESIGN

PESS. DROP @ DESIGN FLOW

WEIGHT

Available MaterialsA743-CF3M (S.S 316L)

1.7

17.0

18.7

0.14

0.75

m3/hr

kg/cm2

kg

m3/hr

m3/hr

D S V Unit

▀ SPECIFICATION ▄

MAXIMUM

FLOW RATE

A743-CF8M (S.S 316 )

LOWER BODY

STEM

OUTER SPRING

INNER SPRING

SPRING RETAINER

LOCK NUT

TEFLON SLEEVE

BODY

DISC (SPREADER)

GASKET

WASHER

ELASTIC STOP NUT

• 1/2" - 20NF

10

3

12

5

4

11

7

9

6

1

2

8

• P.T.F.E

• SILVER PLATED




PESSCO


TEL

FAX

:

:

+82-51-329-7145

+82-51-329-7155

Web

E-mail

:

:

www.pessco.com

[email protected]

4

▀ PERFORMANCE ▄

12010080604020

20.417.013.610.23.4 m3/hr

%

0.03

0.17

0.13

0.11

0.09

0.07

10

PR

ES

SU

RE

DR

OP

, kg

/cm

2

FLOW RATE per VALVE (% of Rated Capacity), m3/hr

1.7

0.05

0.15 DESIGN POINT

6.8

Pressure Drop

in Flow rate

Spray Angle

in Flow rate

1201008060402010

SP

RA

Y A

PE

X A

NG

LE

, °

FLOW RATE (% of Rated Capacity)

66

64

62

60

58

56

54

52

50

48

46

%




PESSCO


TEL

FAX

:

:

+82-51-329-7145

+82-51-329-7155

Web

E-mail

:

:

www.pessco.com

[email protected]

5

▀ SPRAY PATTERN ▄

You can see the Benchmark Test that compared DSV with Conventional Valve on Our Website.

Unit : m3/h

6.0

8.0

10.0

12.0

14.0

16.0

18.0

19.0




PESSCO


TEL

FAX

:

:

+82-51-329-7145

+82-51-329-7155

Web

E-mail

:

:

www.pessco.com

[email protected]

6

▀ RELATED PRODUCT ▄

- Tray

Type 430Material

on Stainless Steel

Dim

en

sio

n,

mm

Type 316 & 316L

TRAY

Assembly

• 16 Gauge Stainless Steel

• All Riveted Construction

• 8 Trays per Assembly

• Slots for Hold down Rods

Type 304 & 304L

37

inchSize

30

inch

24

inch

Weight, kg

Height

5.1 4.3 3.5

Width

Length

280

102

940 762 610

37 inch

30 inch

24 inch

102

102

102



Plant Engineering Solution & Service Corporation

PESSCO CO., LTD.PESSCO

Any further information about PESSCO, please visit our website

Rm.617, Byucksan Digital Valley, 303, Daedong-ro,

Sasang-gu, Busan, 617-731

Rep. of KOREA

TEL FAX: +82-51-329-7145 +82-51-329-7155

HEAD OFFICE

FACTORY 1st Floor, 82, Hwajeonsandan 2(i)-ro,

Gangseo-gu, Busan, 618-280

Rep. of KOREA

:

TEL FAX: +82-51-403-3145 +82-51-405-5520:

www.pessco.com

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