spray vavle catalog

7/26/2019 Spray Vavle Catalog

1/8

SPRAY VAVLE

Plant Engineering Solution & Servi ce Corporation

Double spring

Spray

Valve

PESSCO CO., LTD.

DSV is paten ted item.

(Reg. No. 10-0423264)


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SPRAY VALVE Double spring Spray Valve

PESSCO

Plant Eng ineering Solution & Service Corpor ationRm 617 Byeoksan Digital Valley, 303, Daedong-ro, Sasang-gu, Busan, Korea

TEL

FAX

:

:+82-51-329-7145

+82-51-329-7155

Web

E-mail

:

:www.pessco.com

[email protected]

1

Acco rding 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,

PESSCOhas 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 DISCdue 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.

DISCmanufactured 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 631J1because 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 Instal lation

and Best Spray Pattern

DSVis...

DSVs are in stock for immediate delivery.
http://www.pessco.com/mailto:[email protected]://www.pessco.com/mailto:[email protected]:[email protected]://www.pessco.com/


3/8


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 Nutare 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 patternunder 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 isideal for instantaneous heating in deaeration.

STAINLESS STEEL STEMmanufactured with drawing process.

NON-BINDING TEFLON SLEEVEminimizes friction between BODY

and STEMduring 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.


4/8


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


5/8


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

PRESSURE

DROP,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

SPRAY

APEX

ANGLE,

FLOW RATE (% of Rated Capacity)

66

64

62

60

5856

54

52

50

48

46

%


6/8


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 DSVwith Conventional Valve on Our Website.

Unit : m3

/h

6.0

8.0

10.0

12.0

14.0

16.0

18.0

19.0


7/8


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

Dimension,

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


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Plant Engineering Solution & Service CorporationPESSCO CO., LTD.

PESSCO

Any further information about PESSCO, please visit our website

Rm 617, Byeoksan Digital Valley, 303, Daedong-ro ,

Sasang-gu, Busan,

KOREA

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

HEAD OFFICE

FACTORY 82, Hwajeon Sandan2-ro,Gangseo-gu, Busan

KOREA

:

www.pessco.com

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