T@z - ntkmy

T@z;EN
A joint reliance
MOOHA
WATER
HAMMER
ABSORBER
SHOCK
Introduction
The occurrenceof waterhammeris quitecomplicated processexistingin waterpipingsystem.lt is in
fact water shock wavescaused by rapidclosing/openingof valvesused in pipingsystemsor
improperlayoutof pipingsystems.
This undesirablephenomenonmay reduceservice
lifeof equipmentor otheraccessoriesof pipingsystem if it is not checked.
After years of study and testing,we havecome to
developMOOHAwhichease and smoothaway
shock of water wave.
MOOHAhas beenwidely
Sinceits development,
appliedin variousapplications.
Features
1. FastResponse
MOOHA'responsesfast and effectivelyagainst
waterhammer,thus relievesthe systemfrom
abnormalshockwithoutrestrainingwaterflow.
2. SimpleInstallation
MOOHAs compactin design.lt requires
and can
minimumspacefor installation
be connecteddirectlyin seriesto piping
C ON NECTI O N
FLANGE
P R E S S U R E-\
GA U GE
'
systemin manydirections.
T-C OU P LIN G
3. HighDurabilityand Economy
MOOHAis designedfor optimumperformance
whilepriceis affordable.
Its casingis constructedof mild steeland
elasticinnertube is madeof highgrade
syntheticrubber.
is patented
PT-MOOHA@
in USA,CANADAand AUSTRALIA
PATENTNO. 4186775(USA)
1047365(CANADA)
485621(AUSTRALIA)
\
.-i
Ilnstallation Location
InstatlMOOHAat locationsof waterhammer
sourceas close as possibleas follows.
T-ao
I f $,-'"'ice
H(m)
(L)
servicevalve
It'oTt"'
varve
water
supply
MOOHA
+r/-MOOHA
MOOHAinstallednext to ballfloatvalve.
V -check valve
-.-rozEN
-
I
|
I
Ao*o
MOOHAinstallednext to solenoidvalves.
MOOHAinstallednextto pump.
Off-lineinstallation
is also availableas
follows.
ballfloatvalve
shut-offflange
\
MOOHA*ffi
-
gate valve
-
checkvalve
MOOHA*
/
:-TOZEN
PurnP+
*TOZEN
ELBOFLEX
gate valve
-
checkvalve
.-
TOZEN
TWINFLEX
/
shut-offflange
TWINFLEX
..-
+
PUmP
-TOZEN
ELBOFLEX
lExample of Installation
Off-lineinstallation
Installation
in riserfor liftpump
PressureDurabilityTest
lNotes
1. Air chamberpressureis pre-setat 0.5Mpa
as standardin the factory,but optimumair
chamberpressurewill be approx.50% of
maximumworkingpressure.This pressure
can be adjustedby pumpingin air or
releasedby nipplevalve.
Installation
in riser
2. Priorto installation,
checkto ensurehex.
sockethead cap screwsare in placeand fastened.
3. When placingorder,pleaseadviseof the
pipe diameter,piperun,flow velocity,working pressure,waterhammersource,etc.
Iselection of MOOHA
1. SurgePressureof WaterHammer: Ps
(m/s) x 1.37{t4} =l
Ps = FlowVelocity
=
lx t .37{141
MPa {kgf/cm2}
2. Relationship
with Max.lmpactPressurePb and NormalWorkingPressureP
Pb
P
Ps+P
P
=
times
3. Calculation
for Absorption
Capacity
9 = 4 x 1 o -x3
( 0 . 0614L - t ) n
!,
A-1
Note: q = Requiredcapacityof pressureabsorption
Q = Flow rate
/min.
waterhammerpresure(Pm) and
,l = Ratioof allowable
normalworkingpresure(P)
A - -+-
= 1.5 (wherenotspecified
specially)
L = Totalpiperun
m
t = Closing
timeof valveor pump(normaly
0.2sec.)
factor0.5
D= Coefficient
(0.0164
x Fiper*-]- o.z)x0.5
x .']f ,
e= 4x 10'3
" FbffiCl
t.iJ
-
|
=0.006
x l r t o w r a t e l ( 0o. 40 x1l p i p e r u n l - 0 . 2 )
I
4. Selectionof Modeland Size
Compare
thevalueof q gotfromthe above3 to airchambercapacityby models
in thetableof dimensions
andselectthe model.
Consequently,
,
MOOHAMH-l
l=(AirChamberCapacity
)x
pcs.
to be installedas closeas possibleto water hammersource.
4
AGAUTIIIII
Operatingconditionsand other performancedata publishedin this catalog have
been developedfrom our designcalculation,in-housetesting,field reportsprovided
by our customersandlor publishedofficialstandardsor specifications.They are
good only to cover typical applicationsas a generalguidelineto users of TOZEN
productsintroducedin this catalog.
For any specificapplication,users are kindly requestedto contact TOZEN SANGYO CO., LTD. for technicaladvice,or to carry out their own study and evaluation
for providingsuitabilityof these produci6to such an application. Failureto follow
this requestcould result in propertydamage and/or personalinjury,for which we
shallnot be liable.
.tJ
While this cataloghas been compiledwith the utmostcare, we assume no responsibilityfor errors,improprietyor inadequacy.Any informationprovidedin this catalog is subject to from-time-to{imechange without notice for error rectificationor,
productdiscontinuation,
design modification,new productintroductionor any other
cause that TOZEN SANGYOCO., LTD. considersnecessary.This editioncancels
all previousissues.
X The contentsof this literatureare subjectto changewithoutnotice.
TOZENSANGYOCO.,LTD.
8-4, Asahi,Yoshikawa
Saitama342-0008
Japan
Phone: (048)993-1035
Fax :(048)993-1018