MB2000/3000/5000 OPERATING AND MAINTENANCE MANUAL
TAYLOR-WHARTON (BEIJING) CRYOGENIC EQUIPMENT CO., LTD.
9
FUNCTIONAL DESCRIPTION
TANK CONSTRUCTION
The MB tanks are vertical tanks with a maximum allowable working pressure of 1.6MPa (232 psig ) for
M series tank and 3.5MPa (507.5 psig ) for V series tank. The pressure vessel is suspended inside a
vacuum jacket by neck-tube, and with super insulated of multilayer inorganic glass-fiber nonwovens and
aluminum foils under high vacuum. All piping is designed to withstand the stresses caused by expansion
and contraction of the pressure vessel, its support system and piping itself.
The pressure vessel is designed and constructed in accordance with the ASME Boiler and Pressure Vessel
Code Section VIII, Division 1. The inner vessel and outer vessel is constructed of 304 staiLI1ess steel and
the piping is staiLI1ess steel.
The tank evacuated to a high vacuum through a PSE3. The PSE3 will be closed down automatically after
pumb-vacuum. DO NOT OPEN the PSE3.
MAIN PARTS FUNCTIONAL
FILLING CONNECTION
（
FC
）
a device to prevent filling the vessel with the wrong product, each product
(LIN/LOX/LAR) have its own standard fitting.
CHECK VALVE CUSTOMER
（
CVl
）
prevents flow out of the tank through the valve
；
BOTTOM FILL VALVE
（
HV1
）
while filling through the valve tends to increase tank pressure
；
TOP FILL VALVE
（
HV2
）
Filling through the valve tends to reduce tank pressure
；
FULL TRYCOCK VALVE
（
HV5
）
used to determine fill termination
；
GAS SUPPLY VALVE
（
HV100
）
Product use valve, it locates the outside of atmospheric vaporizer line outlet,
it shut off or open the product to use high quality gas.
BOTTOM LIQUID VALVE
（
HV18
）
provide liquid oLI1y withdrawal from the tank
。
PRESSURE BUILD-UP VALVE
（
HV3
）
It lets the liquid of the container flow to the build-up pressure line when it is
opened.
PRESSURE REGULATOR
（
PCV1
）
When tank pressure decreases to PCV1 set-point , it opens and liquid flows
from the bottom of the tank through
；
When tank pressure increases above the
regulator’s set point it closes and the pressure building process stops
RESSURE BUILDING COIL
（
E1
）
This liquid product is vaporized in the coil and expanded gaseous product
returns to the top of the tank maintaining tank pressure
；
ECONOMIZER REGULATOR VALVE
（
PCV3
）
When tank pressure exceeds the set point of PCV3,the gas will flow from the
top of the tank through CV2 and finally exits through
。
BACK PRESSURE REGULATOR
VALVE
（
PCV3
）
When tank pressure exceed PCV3 set-point , it opens and pressure reduce .it
can prevent PSV1 and PSV2 frequent action and let it works longer.
SAFETY VALVE
（
PSV1
，
PSV2
）
OvePCV1ressure protection for the pressure inner vessel,The pressure relief
valves provide primary protection for the inner vessel
；
VACUUM BURSTING DISC
（
PSE3
）
The tank vacuum jacket is protected from ovePCV1ressure
。
BURSTING DISC
（
PSE1
，
PSE2
）
OvePCV1ressure protection for the pressure inner vessel, the rupture disks
are secondary safety devices
。
ESAFETY LINE PURGE VALVE
（
HV14
，
HV15
）
It releases the high pressure gas of safety line when replace safety valve
PSV1 or PSV2,and can be one connector to withdrawing gas to test .
TANK PRESSURE GAUGE
（
PI1
）
Tank pressure is indicated by PI1
；
LIQUID LEVEL GAUGE
（
LI1
）
percentage based on calibrated in inches of water and a conversion chart
located next to the liquid level gauge is used to convert the gauge reading to
volume of liquid
。
GAS ISOLATION VALVE
（
HV9
）
a bypass valve connecting the instrument lines should be installed between
the isolation valves and the device
；
LIQUID ISOLATION VALVE
（
HV11
）
connected to a pressure tap attached to the bottom to the pressure vesse
：
