CONTENTS
1.

Safety valves for cargo tanks

2.

Safety valves for boiler service

3.

Safety valves for piping

4.

Classification Society

Appendix A: PSL-MD Series
Appendix B: PSL-MP Series
Appendix C: SL Series
Nominal popping capacity list for safety valves for steam service
Appendix D: SP Series
Appendix E: RE Series
Appendix F: Safety valve type approval list

1. Safety valves for cargo tanks
These safety valves are used for installation on cargo tanks for LNG vessels, LPG vessels,FPSO (Floating Production, Storage and Offloading system), FSO (Floating Storage andOffloading system) and other types of systems and vessels.
As safety valves for marine use, the pilot-operated safety valve structure is adopted because
the set pressure is not affected by vibration. The following two types are available:
 PSL-MD Series: Low pressure/ diaphragm type mainly used onboard LNG vessels
 PSL-MP Series: Low pressure/piston type mainly used onboard pressure type LPG
vessels

2. Safety valves for boiler service
As safety valves for marine boiler use, the following series are available from our lineup.
SL and SJ series of cast steel makeSP series of bronze casing make for small package boilers

These series valves have been designed and developed for steam service only, featuring firm
seat tightness during operation and secure operating performance in case of an emergency.

3. Safety valves for piping
RE series provides high flexibility in service as safety valves for cargo piping and utilities.

4. Classification society
Theses series of safety valves have been type approved from each classification society.

Operating the safety valves

Be careful of a reaction force at the time of popping action.
Use a blowoff pipe of a size equivalent to or larger than the blowoff port diameter of safety valve.
Maintain the distance between the valve axis of safety valve and the center of blowoff pipe to be less than
4 times the blowoff port diameter. Such a blowoff pipe should be minimized in its length with no bending,and it should be led to outside while making the structure as simple and reliable as possible.
Make sure that the back pressure that is generated inside the blowoff pipe at the time of valve operation isless than 10% of the set pressure. Failure to do so may result in unstable operation of the valve.
In addition, the blowoff piping arrangement should be such that the safety valve is not unduly affected bypossible thermal expansion of a boiler, equipment and/or a blowoff pipe.
When installing a drain pipe on the blowoff pipe, keep the drain pipe open at its bottom end.
Do not bind the safety valve with a drain pipe.
To remove drain generated in the blow-off process of a safety valve, or rainwater, be sure to provide a drainpipe separately from other pipes to avoid binding the safety valve. Furthermore, keep the drain pipe open
at its bottom end and do not equip a cock or a valve at that end.
When performing a hydrostatic pressure test, be careful of the test pressure.
At the time of a hydrostatic test, check the test pressure and make sure that it is never exceeded. Some
safety valves have a hydrostatic plug inserted in the nozzle seat for hydrostatic test purposes. In this case,be sure to remove the hydrostatic plug in the period between after completing a hydrostatic pressure test
and before starting operation. For details, see the instruction manual.
Do not tinker with the safety valve lever,The lever equipped on the safety valve should not be touched or lifted unless it becomes necessary. Doingso may cause the valve to malfunction.
Do not use a safety valve as a foothold.
Do not use the installed safety valve as a foothold because damage may result. Accidental operation of
the valve in that condition may create a dangerous situation.
Be careful of the safety valve installation environment.
If the safety valve installation environment is close to a heat source, or conversely it is exposed to a cold
wind, the valve may malfunction or cause poor gastightness due to uneven expansion or shrinkage
caused by the thermal effect from outside. In such a case, change the installation place and takemeasures for heat insulation. When installing heat insulation material, cover the valve body section down
to its lower end while taking care not to cover the adjusting lock bolt.
When dismounting or disassembling the safety valve, be careful of the pressure.
Before attempting to dismount the safety valve for maintenance or repair purposes, or to disassemble it in
an installed condition, check that no internal pressure exists in the equipment on which the safety valve ismounted. Failure to do so may result in a serious accident.
Secure a work space around the safety valve.
For disassembly, checking and adjustment purposes of safety valves, secure a work space around them.
To allow a hoisting chain block to be used, a disassembling space is required above the safety valve.

Warranty
We thank you for patronizing our FUKUI products
We provide our products under the standardized production process and strict quality control. However, inthe event that a failure should occur due to our production deficiency, the product shall be repaired on afree-of-charge basis or replaced with a new one in accordance with the following warranty conditions. If
this is applicable, then please feel free to contact us.
1. Warranty period
The warranty period shall be 12 months after operation is initiated, or it shall not exceed 18
months after delivery from the Factory, whichever comes earlier.
2. Coverage
If a failure responsible for us should occur within the warranty period, the product concerned shallbe repaired or replaced with a new one on a free-of-charge basis. However, this shall not apply if
any of the following conditions is met.
2-1. if seat leaks or unstable operation should occur due to foreign matter present inside theboiler or piping;2-2. if the product was improperly handled or operated;
2-3. if the failure is due to other causes than ours.;
2-4. if unauthorized repair or modification was made;2-5. if the product was handled, stored or operated under harsh environmental condition
exceeding the design specification;
2-6. if the fault is due to parts declared to be subjected to quick wear, to the customer;
2-7. if the fault is due to a fire, flood damage, earthquake, lightning, other natural disaster or actof God; or
2-8. When making repairs or adjustments in the product installation place that is at an elevatedlevel or at a dangerous position, or if the product is very heavy requiring a specialist andspecial tools and equipment (such as a crane and scaffolding) for dismounting andremounting, then costs related to this work shall not be covered by the warranty.
3. Plants in foreign countries
If a failure responsible for us should occur within the warranty period, we shall provide a
replacement at our expense on an FOB or ex-factory basis under the same coverage condition
as stated in section 2 above.
4. After-sales service
If a supervisor or worker(s) should be requested for dispatch to the site, traveling expenses,
accommodation expenses, daily allowance and all other necessary expenses shall beseparately charged to the customer.

Features

Introduction
FUKUI RE series safety valvesFUKUI RE series safety valves are born out of ourtechnology and experience in design and production ofsafety valves accumulated over about 50 years of businessin this filed.
Various types of FUKUI safety valves have met a variety ofcustomers’ needs for many years, and the recent addition,
to the lineup, of the RE series featuring a simple design,high performance and low cost makes us believe that we
can contribute more to prevention against excessive
pressure particularly in the process line. Fluids applicableinclude air, steam and other various gases, vapors andliquids.

■ A disc and a disc holder are of an assembly structure.
In addition, the disc is disc-shaped, presenting asimple design, and therefore minimizing the thermal
effect by high temperatures. As a result, excellent
sealing performance is attained against seat leaks.
■ By forming the disc holder periphery to beumbrella-shaped for utilization of a fluid reaction force,an excess pressure (i.e. increased by less than 10%
above the popping pressure) is created to allow perfectlifting of the disc. Furthermore, as a mechanism forattaining clear popping by acceleration of initial valve
lifting at the time of valve operation, and also as ameans of blowdown pressure adjustment, an adjusting
ring is provided on the upper edge of the nozzle.
■ The safety valves of this series consist of parts that arerequired as minimum, each having interchangeability.
This means that minimum quantities of spares will do,allowing easy maintenance and significant cost
reduction.
■ The inlet/outlet face-to-face dimensions are inaccordance with API Standard 526.