SAFETY VALVES, RELIEF VALVES ( LIFT TYPE )

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1 ( LIFT TYPE ) SL3H Type SPECIFICATIONS Moel name Coe name Cap type Size Applicable flui Set pressure range Applicable temperature En connection Valve boy pressure test Materials Boy Disc Seat ring Size ~mm:stainless steel, Size 1~0mm:Cast bronze * 1. For liquis, size ~ mm, use coe name SLHWG. *. RF flange for outlet sie is available upon your request. * 3. Applicable temperature Max. is available upon your request. DIMENSIONS Size ( ½" ) ( ¾" ) (1 ") (1 ½" ) ( ") ( ½" ) (3 ") ( ") 1(5 ") 0(6 ") Seat opening ia. D (1) (0) SL3H SL3HG Coe No. of pressure ivision is require in. With lever Without lever ~( ½" ~ ½" ) ~0(3 " ~6 ") ~( ½" ~ ½" ) ~0(3 " ~6 ") 1. Steam & air Steam, air, gases & (liquis* ) 0.035~1.0MPa 5~ 5~18 * 3. Lift l SL3 SLH SL SL3B SLHBG * SLB Flange JIS 10KFF*. Hyraulic 1.5MPa Cast iron Stainless steel Cast bronze Stainless steel Effective area (mm ) πdl (16.0) 09.6 (1789.8) (3.).0 (3.8) * Figures in ( ): Size 1 an 0mm for Cast iron boy with Stainless steel isc an seat ring. Cast bronze Face to Face Mass(kg) Height H L 1 L SL3H,3 Type SLH, Type Flange coe JIS 10KFF CONSTRUCTION SLH Type PRESSURE DIVISION Coe No SL3HG,SLHBG Size ~mm * Coe No. of pressure ivision is require in ~0. Over 0.~0.6 Over 0.6~1.0 SLHWG Size ~mm SLHWG SL3B, SLB Size ~mm 0.035~0.07 Over 0.07~0. Over 0.~0.3 Over 0.3~0.6 Over 0.6~1.0 Size ~mm 0.035~0. Over 0.~0. Over 0.~0.7 Over 0.7~1.0 Size 1~0mm 0.035~0.07 Over 0.07~0.1 Over 0.1~0.3 Over 0.3~0.5 Over 0.5~0.7 Over 0.7~0.85 Over 0.85~1.0 Depening on nominal iameter, the structure of the valve may be ifferent from what is shown in the rawing.

2 Applicable Laws/Regulations an Formulas for Calculating Relieving Capacity Coefficients assigne to equations may be those specifie in applicable laws/regulations or inhouse ata. Inhouse ata (1) For steam Qm=5.6CK' A (P+0.1) 0.9 Qm: Nominal Relieving capacity (kg/h) A: Seat opening area (mm ) Lift type: A= πdl Full bore type: A= D: Seat opening iameter (mm) l: Lift (mm) : Throat iameter (mm) () For gasses Qm=C' K ZT M 'A P1 0.9 Qm: Nominal Relieving capacity (kg/h) A: Seat opening area (mm ) Lift type: A= πdl Full bore type: A= D: Seat opening iameter (mm) l: Lift (mm) : Throat iameter (mm) Z: Compression coefficient: 1 (see Fig.1 in page 89) T: Absolute temperature (K) of gasses at relieving pressure P: Relieving pressure (MPa) (Select the larger one of set pressure 1.1 or set pressure +0.0) C: Coefficient etermine accoring the nature of steam (see Tab. 1 in page 87) 1: Set pressure is less than 0.MPa, at saturate pressure 0.98: Set pressure is larger than 0.MPa, at saturate pressure In the case of super heate steam, see Tab.1, page 87. K ': Relieving coefficient Lift type:0.96 Full bore type:0.86 C': Coefficient accoring toκan P /P 1(See Fig.3, page 89) κ: Aiabatic exponent (Cρ/C υ) (See Tab., page 87). The value is consiere 1 if it is not clear. P : Back pressure (MPa A) K ' : Relieving coefficient Lift type:0.96 Full bore type:0.86 M: Molecular weight of gas (see Tab., page 87) P 1: Relieving pressure (MPa A) (Select the larger absolute pressure of set pressure 1.1 or absolute pressure of set pressure +0.0) Calculating maximum flowin gas using the following formula: G=0.008υρ G: Flow in gas (kg/h) υ: Velocity of gas (m/sec) (More than for saturate steam, more than for superheate steam, or move than 10 for common gas) ρ: Density of gas (kg/m ) : Internal iameter of pipe (mm) (3) For water/hot water (also applicable for hot water with temperature higher than 1 ) (1) In case of searching from relieving capacity: W S= 87.7 (P 1+0.1) κγ1 ()In case of searching from thermal input of pressure vessel or thermal out put of hot water boiler: S= Qε 87.7C (P 1+0.1) κγ1 (If (P 1+0.1) κ >(P1P ) in equations (1) an (), replace (P1P ) with (P 1+0.1) κ) S: Seat opening area (mm ) W: Relieving capacity of valve (kg/h) P 1: Relieving pressure (MPa) (see Note) Lift type: set pressure 1.1 For SL37~, see page 69. Full bore type: select the larger one of set pressure 1. or set pressure Relief valve (type E ED): select the larger one of set pressure 1. or set pressure P : Outlet pressure (MPa) κ: Correction coefficient (see Fig. in page 89) Δt: Difference between the saturate temperature of relieving pressure P1 an the temperature of hot water at inlet. ( ) γ1: Density hot water at inlet (kg/l) (see Tab.3 in page 88) Q: Thermal input of pressure vessel or thermal output of hot water boiler (kj/h) ε: Coefficient of volumetrical expansion for water (l/ ) (see Tab. in page 88) C :Specific heat of water at constant pressure (kj/kg ) (see Tab. in page 88) In the case of full bore type safety valve or relief valve, make sure the pressure oes not excee 1.1 times maximum working pressure of pressure vessel or hot water boiler (or maximum working pressure +0.03).

3 Applicable Laws/Regulations an Formulas for Calculating Relieving Capacity Coefficients assigne to equations may be those specifie in applicable laws/regulations or inhouse ata. Inhouse ata (1) For steam Qm=5.6CK' A (P+0.1) 0.9 Qm: Nominal Relieving capacity (kg/h) A: Seat opening area (mm ) Lift type: A= πdl Full bore type: A= D: Seat opening iameter (mm) l: Lift (mm) : Throat iameter (mm) () For hot water (Applicable when temperature is less than 1. If temperature is higher than 1, then use the formula escribe in (1)) (1) In case of searching from relieving capacity: W S= 87.7 (P 1+0.1) κγ1 ()In case of searching from thermal input of pressure vessel or thermal out put of hot water boiler: S= Qε 87.7C (P 1+0.1) κγ1 (If (P 1+0.1) κ>(p1p ) in equations (1) an (), replace (P1P ) with (P 1+0.1) κ) S: Seat opening area (mm ) W: Relieving capacity of valve (kg/h) P: Relieving pressure (MPa) (Select the larger one of set pressure 1.1 or set pressure +0.0) C: Coefficient accoring the nature of steam (see Tab.1 in page 87) 1: set pressure is less than 0.MPa, at saturate pressure 0.98: set pressure is larger than 0.MPa, at saturate pressure In the case of overheate steam, see Tab.1, page 87. K ' : Relieving coefficient Lift type:0.96 Full bore type:0.86 P 1: Relieving pressure (MPa) (see Note) Lift type: set pressure 1.1 For SL37~, see page 69. Full bore type: select the larger one of set pressure 1. or set pressure Relief valve (type E ED): select the larger one of set pressure 1. or set pressure+0.03 P : Outlet pressure (MPa) κ: Correction coefficient (see Fig. in page 89) Δt: Difference between the saturate temperature of relieving pressure P1 an the temperature of hot water at inlet. ( ) γ1: Density hot water at inlet (kg/l) (see Tab.3 in page 88) Q: Thermal input of pressure vessel or thermal output of hot water boiler (kj/h) ε: Coefficient of volumetrical expansion for water (l/ ) (see Tab. in page 88) C: Specific heat of water at constant pressure (kj/kg ) (see Tab. in page 88) NOTE It is necessary installing safety valve when water temperature excees 1. The formula is as the following: Qm=5.6CK 'A(P+0.1) 0.9 In this case, the require relieving capacity (kg/h) of safety valve can be calculate using the following formula: Q W= h1 h W: Relieving capacity (kg/h) Q: Thermal output of hot water boiler (kj/h) h1: Enthalpy of saturate steam that is equivalent to the maximum working pressure of boiler (kj/kg). h : Enthalpy of water supply (kj/kg) W= Qε C ε: Coefficient of volumetrical expansion for water (l/ ) (see Tab. in page 88) C: Specific heat of water at constant pressure (kj/kg ) (see Tab. in page 88) (3) For Dowtherm boiler Qm=C' K ZT M 'A P1 0.9 Qm: Nominal relieving capacity (kg/h) A: Seat opening area (mm ) Lift type: A= πdl Full bore type: A= D: Seat opening iameter (mm) l : Lift (mm) : Throat iameter (mm) Z: Compression coefficient: 1 (see Fig.1 in page 89) T: Absolute temperature (K) of gasses at relieving pressure C': Coefficient accoring to κan (See Fig.3, page 89) κ: Aiabatic exponent ( C C ) (See Tab., page 87). The value is consiere 1 if it is not clear. P : Back pressure (MPa A) K' : Relieving coefficient Lift type:0.96 Full bore type:0.86 M: Molecular weight of gas (see Tab., page 87) P 1: Relieving pressure (MPa A) (Select the larger absolute pressure of set pressure 1.1 or absolute pressure of set pressure +0.0)

4 Applicable Laws/Regulations an Formulas for Calculating Relieving Capacity Coefficients assigne to equations may be those specifie in applicable laws/regulations or inhouse ata. Inhouse ata W=161 AK PG W: Relieving capacity (kg/h) A: Seat opening area (mm ) Lift type: A= πdl Full bore type: A=0.785 D: Seat opening iameter (mm) l:lift(mm) : Throat iameter (mm) G: Specific gravity P: Relieving pressure (MPa) K: Flow coefficient Lift type: 0.55 for upper guie type 0.5 for blae type The value may be ifferent epening on type an accumulation Full bore type: 0.60 [ ] TABLE1. COEFFICIENT ACCORDING TO PROPERTY OF STEAM Absolute pressure Mpa Temp. Saturate temperature * Intermeiate values of pressure an temperature in this table are calculate by proportional metho. However, In case of Absolute pressure less than 0.5MPa refer at absolute pressure 0.5MPa. Example. Incase of Absolute pressure: 1.MPa, Temperature:, C=0.960 TABLE. GAS PROPERTY Physical property Name Acetylene Air Ammonia Argon Benzene Isobutane Normal butane Carbon isulfie Carbon ioxie Carbon monoxie Chlorine Cyclohexane Normal ecane Ethane Ethyl alcohol Ethylene Helium Normal heptane Normal hexane Hyrogen chlorie Hyrogen Hyrogen sulfie Methane Methyl alcohol Methyl chlorie Nitrogen Nitrogen suboxie Normal nonane Oxygen Normal pentane Normal propane Steam Sulfur ioxie Toluene Propylene Octane CH Chemical symbol NH Ar CH 6 6 isoch10 nch10 CS CO CO Cl CH 6 1 nc10h CH 6 CHOH 5 CH He nch 3(CH ) 5CH3 nc6h1 HCl H HS CH CH3OH CH3Cl N NO nch 3(CH ) 7CH3 O nch 3(CH ) 3CH3 nchchch 3 3 HO SO CHCH CH3CHCH CH 8 18 Molecular weight Aiabatic inex Cp/Cv κ Critical temp. Tc K Critical pressure Pc MPa * 1. For air, Tc=13.5(K) an Pc=3.769(MPa A) *. When obtaining the compression factor Z of hyrogen an helium, a 8 to both Tc an a 0.8 to both Pc.

5 Applicable Laws/Regulations an Formulas for Calculating Relieving Capacity TABLE3. HOT WATER SPECIFIC GRAVITY Temp. Pressure MPa A Remarks:Intermeiate values in this table are calculate by proportional metho. * In case of below : TABLE. COEFFICIENT OF VOLUMETRICAL EXPANSION FOR WATER Temp. Below Specific heat C kj/kg.0 Expansion coefficient ε l/ Remarks:Intermeiate values in this table are calculate by proportional metho C P/P C P/P C P/P C P/P * In case κ takes mile value. Obtain P /P1with interpolation an isregar below places to ecimals, an isregar below ecimal point for C.

7 RELIEVING CAPACITY (PRESSURE VESSEL CONSTRUCTION CODE) <Steam> FULL BORE TYPE Qm=5.6CK 'A (P+0.1) 0.9 SF1H, H SF L, L SF 13L, 1L SF 13L SF 16L (0.1 1MPa) ~ SF 17L SF 18L (1 MPa) ~ SF L SF L ( 3MPa) ~ mm C=0.98(C=1 if set pressure<0.mpa), K ' =0.86 P is the larger one of (set pressure +0.0) or (set pressure 1 { } ) LIFT TYPE mm D Qm=5.6CK 'A (P+0.1) C=0.98(C=1 if set pressure<0.mpa), K '=0.96 P is the larger one of (set pressure +0.0) or (set pressure 1.1) { }

8 SAFETY VALVES, RELIEF VALVES RELIEVING CAPACITY (PRESSURE VESSEL CONSTRUCTION CODE) FULL BORE TYPE { } Qm=C K 'A P 0.9 M ZT mm SF1H, H SF L, L SF 13L, 1L SF 13L SF 16L (0.1~1MPa) SF 17L SF 18L (1~MPa) 1 SF L SF L (~3MPa) 0 LIFT TYPE mm D ' ) C'=7.0, P is the larger one of (set pressure ) or (set pressure 1 K '=0.86, M=8.96, Z=1, T=93 { } Qm=C K 'A P 0.9 M ZT 1 ' ) C'=7.0, P is the larger one of (set pressure ) or (set pressure 1 K '=0.96, M=8.96, Z=1, T= <Air>

9 RELIEVING CAPACITY (BOILER CONSTRUCTION CODE) RELIEVING CAPACITY <Steam> mm D mm SF1H, H SFL, L SF13L, 1L SF13L SF16L (0.1~1MPa) SF17L SF18L (1~MPa) SFL SFL (~3MPa) LIFT TYPE FULL BORE TYPE D:Seat opening ia.(mm), A:Seat opening area(mm ) { } C=0.98(C=1 if set pressure<0.mpa), K '=0.86 P=set pressure 1.03 (In case of set pressure<0.1mpa,p=set pressure +0.0MPa) Qm=5.6CK 'A 0.9 (P+0.1) { } C=0.98(C=1 if set pressure<0.mpa), K '=0.96 P=set pressure 1.03 ( In case of set pressure<0.1mpa,p=set pressure +0.0MPa) Qm=5.6CK 'A 0.9 (P+0.1)

10 RELIEVING CAPACITY (VENN STANDARD) <Liquis> (Except Hot water an water) FULL BORE TYPE W=161 AK PG (K=0.6, G=1, Accumulation % A=0.785t ) SF SF1 SF1 SF16 (0.1 1MPa) ~ SF18 (1 MPa) ~ SF ( 3MPa) ~ Size mm P:Relieving pressure(mpa), t:throat ia.(mm) * * Coefficient K an Accumulation are ifferent accoring to types.. P (MPa), which is for actual calculation to ecie ischarge amount, is (P)+(Accumulation) (Back pressure) LIFT TYPE W=161 AK PG (K=0.55, G=1, Accumulation 10% A= π D l ) mm D P:Relieving pressure (MPa), D:Seat opening ia.(mm), R:Lift(A) * * * Coefficient K, Accumulation an Lift are ifferent accoring to types.. Refer to page 69 for safety relief valves (SL37~F Type). 3. P (MPa), which is for actual calculation to ecie ischarge amount, is (P)+(Accumulation) (Back pressure)

11 Extract from JIS B8109 Spring Safety Valve for Steam an Gases Allowe eviation of ischargestarting pressure (1) For steam There is no provision on the relief pressure of safety valve for steam. TABLE1. TOLERANCE OF OPENING PRESSURE OF SAFETY VALVES FOR STEAM Set pressure Tolerance () For gasses For valve for gasses, the allowe eviation of start to ischarge pressure is set pressure ±5% (minimum pressure: ±0.0MPa). In case of allowe eviation, which is not allowe to excee set pressure,a the + sie to sie. Note: For valves for gasses, the set pressure is generally the start to ischarge pressure. Below or more an below.3.3 or more an below or more ±0.01 or less ±(3% of set pressure) ±0.07 ±(1% of set pressure) Allowe eviation of opening pressure (popping pressure) (1) For steam See Table 1 for the eviation of opening pressure. In case of allowe eviation, which is not allowe to excee set pressure, a the + sie to sie. () For gasses For safety valves for gasses, the allowe eviation of ischargestarting pressure is less then1.1 times of star to ischarge pressure. However, in the case of setting opening pressure, the eviation shoul be ±3% set pressure (minimum±0.01mpa). BLOWDOWN (1) For steam See Table for the blowown pressure of safety valves for steam. For valves for steam use with through flow boilers, reheater, an piping, which opening pressure excees 0.3MPa, the blowown pressure shoul be less than 10% of set pressure. () For gasses See Table 3 for blowown pressure of safety valves for gasses. *1. For steam, generally the set pressure is assume to be the opening pressure. *. The tolerance of the opening pressure of the safety valves for steam use other than in boilers can be ±3% of the set pressure (minimum value ±0.01MPa). TABLE. BLOWDOWN PRESSURE OF SAFETY VALVES FOR STEAM Set pressure 0. or less Over 0. Blowown *1. Generally, the blowown pressure for steam shall be the ifference between the popping pressure an the reseating pressure. *. The figures in()canbeeterminate in accorance with the agreement between the parties concerne %(%) or less of set pressure TABLE3. BLOWDOWN PRESSURE OF SAFETY VALVES FOR GAS Set pressure Metal seate type Blowown Soft seat type 0. or less 0.03 or less 0.05 or less Over 0. % or less of set pressure % or less of set pressure * 1. Generally, the blowown pressure for gases shall be the ifference between the start to ischarge pressure an the reseating pressure. However, when set by the opening pressure, it shall be the ifference between the opening pressure an the reseating pressure. *. The efinition of the soft seat an metal seate types shall be in accorance with JIS B 0. Note. The blowown pressure efine by Venn shall be in accorance with the Venn stanar unless otherwise specifie by JIS B810.

12 Key Points for Installation of Safety Valve an Relief Valve 1 3 Safety valve shoul be vertical to pipe. Before installation, remove scale an ust an clean the surfaces that contact with gasket. The iameter of the installation pipe shoul be larger than the iameter of valve. To reuce pressure loss to minimum egree, the stan pipe shoul be as short as possible. The stan pipe shoul be rigi an har enough to bear the compression force, shearing force, bening stress or other counterforce cause by relieving of safety valve. Compare with the iameter of the outlet of safety valve, the iameter of the ischarge pipe shoul be as large as possible. The ischarge pipe shoul be as short as possible, without any bening, lea to outsie of the oor or other safe place, an be properly supporte to avoi the occurrence of unesire stress (incluing thermal stress). When eciing the place that the outlet of the ischarge pipe faces, pay attention to the following issues. To avoi installation place where is influence by explosive soun an blast. Avoi amage to electrical equipments, machines, tools etc. in the case the flui is steam or water. Avoi corrosion, poisoning, anoxia etc. in the case the flui is harmful gas. 5 6 In the case of screwe type safety valve or relief valve, install union joint at the ischarge pipe of the outlet sie to allow easy ismounting (see Fig.1 in next page). At parts of the ischarge pipe where rain or rain may accumulate, install the rain outlet, which is possible to ischarge rain completely,an connect to ike. In the case of full bore type safety valve for liquis or harmful gasses an have faucet for ajusting back pressure, install the valve on the outlet ischarge pipe (see Fig.3 in next page). 7 8 To avoi averse impact on safety valve that is cause by thermal expansion of evices or ischarge pipe, install proper expansion joint at the outlet of valve an install a ischarge pipe at the en (see the figure below). To limit counterforce, the istance between the axes of the valve an the center of ischarge pipe shoul be as short as possible, an the raius of the elbow pipe shoul be at least D (D: the internal iameter of the elbow). below figure also shows the stanar imensions of the ischarge pipe of safety valve. Cares shoul be pai on installation of valves with lever (open type). It may effuse flui from upper cap when such valves are operating (see Fig.5 in the next page). (Drain outlet) (Drain outlet) Example: for steam REFERENCE DIMENSION FOR EXHAUST PIPE Outlet size D (A) B C E L H N (1 ½" ) ( ") ( ½" ) (3 ") ( ") 1(5 ") 0(6 ") 0(8 ") Rc⅜" Rc½" Rc½" Rc½" Rc¾" Rc1" Rc1" Rc1" 1 3 At the installation of safety valves avoi the place where there is possibility to obstruct their functions by vibration or corrosion an o not give impact from outsie. After installation, make sure the pressure of the evice has reache at least % ischarge pressure of the valve before using the test lever to start the valve. Normal working pressure of the equipment shall not excee 90% of the blowown pressure of the valve an to 85% when pulsation is expecte. If possible, remove safety valve before making water pressure test. To make water pressure test without removing safety valve, pay attention to the following below (see Fig. in the next page). a To prevent valve from being amage ue to improper loa, when the pressure of the evice reaches ~90% of ischarge pressure, install test gag* an press lightly on the en of valve shaft. The test gag must be rotate using han. If you rotate it using b spanner or other tools, there may have excessively large pressing force, the seat may be amage, the shaft may be bene, an the valve may not function normally. After water pressure test an the pressure reuces to ~90% relieving pressure,remove test gag immeiately. The test gag is optional item.

for Pressure Vessels,Steam Boiler etc. (2.0MPa)

( FULL BORE TYPE ) for Pressure Vessels,Steam Boiler etc. (.0MPa) SPECIFICATIONS Model name Code name Cap type Applicable fluid Set pressure range Applicable temperature End connection Materials Valve