610-497-2600

MODELS 300 AND 600 SAFETY VALVES

Features

• Heavy duty construction of high quality cast steel with stainless steel full-nozzle trim for optimum performance.
• Bolted yoke design for easy maintenance.
• Steel yoke incorporates a cover-shield for guiding surfaces and provides for fully exposed spring.
• Seats lapped to optical flatness for tight shutoff.
• Dual control rings offer easy adjustability for precision opening with minimum pre-open or simmer and exact blowdown control.
• Heavy duty lift lever assembly.
• All adjustments are factory sealed to help prevent tampering or disassembly.
• Each valve tested and inspected for pressure setting and leakage.
• Gags available.

GENERAL APPLICATION

Suitable for use on steam boilers and generators, pressure reducing stations, reciprocating or rotary air/gas compressors and for pressure vessels including tanks, receivers, intercoolers, oil/gas separators and lines.

TECHNICAL DATA

Connections:
Model 300:300# inlet flange and 150# outlet flange per ansI B16.5
Model 600:600# inlet flange and 150# outlet flange per ansI B16.5
Temperature range[1,2]:-20° to 800°F (-29° to 427°C)
Pressure range[1]:15 to 1000 psig (1 to 69 barg)
Code:ASME I and VIII

NOTES

1. See page 3 for pressure and temperature limits table.
2. Alloy steel spring required for temperatures > 750°f.

PARTS AND MATERIALS

No.Part NameMaterials
1Nozzle[1]SS
2BodySteel, SA216 Gr. WCB
3Warn ringSS, A743 Gr. CF8
4Disc holder[2]SS
5Disc retainerSS, A313-316
6Control ring pin assemblySS, A582-416
7Control ringSS, A743 Gr. CF8
8Warn ring pin assemblySS, A582-416
9GuideSS, A743 Gr. CF8
10YokeSteel, SA216 Gr. WCB
11Bolt[3]Steel, SAE Gr. 5
12LeverDuctile iron, A536
13StemSS, A582-416
14Spring[4]
15Spring stepSteel, commercial grade with coating
16Compression screwSS, A582-416
17Lever pinCS, commercial
18Cotter pinSteel, commercial
19LocknutSS, A582-416 or steel A108-1215 zinc plated
20Lift camDuctile iron, A536
21CapDuctile iron, A536
22Lift nutCS, commercial
23Lift disc nutSS, A582-303
24Lift pinCS, commercial
25Cap screwCS, commercial
26Spring pinSS, commercial
27Stem retainerSS, A582-416
28Retainer locknutSS, A582-416
29ShieldSS, A167-316 sheet
30DiscSS, A479-304

NOTES

1. Specified materials: sa479 ty 304 on ‘f’ through ‘M’ orifices and sa351 Gr. Cf8 on ‘n’ through ‘Q’ orifices.
2. Specified materials: a564-630 condition a1100 on ‘f’ through ‘K’ orifices and a479-304 on ‘l’ through ‘Q’ orifices.
3. 4 bolts required for ‘f’ through ‘P’ orifices and 6 bolts required for ‘Q’ orifices.
4. Specified materials: Cs with anti-corrosion coating for standard service. Alloy steel for high-temperature service.
MODELS 300 AND 600 SAFETY VALVES

Models 300 and 600

PRESSURE AND TEMPERATURE LIMITS

TemperatureMaximum setpressure (psig)
°FModel 300Model 600
-20 to 1007401000
2006801000
3006551000
4006351000
5006051000
6005701000
6505501000
7005301000
7505051000
800410825

NOTES

1. Q orifice maximum set pressure 600 psig.
2. N orifice maximum set pressure 750 psig.
3. P orifice maximum set pressure 750 psig.
4. Maximum pressure subject to temperature/pressure limits.

SPECIFICATIONS

ConnectionsANSIstandardOrifice areaValvedimensionsinApproximate weight
Model numberOrifice[1]Inlet[2]Outlet[3]in2ABC(lb)
300LFF / 600NFFF1¼”1½”0.3074⅞16½37
300LGF / 600NGFG1¼”1½”0.5034⅞16½39
300LHG / 600NHGH1½”2½”0.7855⅜18¼60
300LJG / 600NJGJ1½”2½”1.2875⅜20⅞75
300LKH / 600NKHK2”3”1.839621½95
300LLJ / 600NLJL2½”4”2.8536⅝6⅝26½133
300LMK / 600NMKM3”4”3.5976⅝27⅛159
300LNM / 600NNMN4”6”4.340833⅝230
300LPM / 600NPMP4”6”6.380833⅝226
300LQP / 600NQPQ6”8”11.04539¾400

NOTES

Dimensions are for reference only.
1. Maximum set pressure:
F to M orifice steam or air service – 1000 psig
N and P orifice – 750 psig
Q orifice – 600 psig
2. Inlet flanges are ANSI B16.5
300# (model 300 only), 600# (model 600 only)
3. Outlet flanges are ANSI B16.5-150#

ASME SECTION I STEAM – CAPACITIES (U.S., LB/HR) – FLOW COEFFICIENT = 0.878

Orificearea,in2
FGHJKLMNPQ
Set pressure (psig)(0.307)(0.503)0.785)(1.287)(1.839)(2.853)(3.597)(4.340)(6.380)(11.045)
15440721112518452636408951566221914515832
205098351303213630524734596972021058718329
255799481480242734685379678281831203020826
3064810621658271838836024759691641347223323
35718117618353009429966708409101461491525820
40787129020133300471573159222111271635728317
458561403219035915131796010035121081779930814
509261517236838825546860510848130891924233311
559951631254541735962925011662140712068435809
6010651744272244646378989512475150522212738306
65113418582900475467941054013288160332356940803
70120519743081505172181119814118170342504043350
75127620913264535176461186214955180442652645922
80134822083447565180741252615793190552801248494
85141923263629595085031319116631200662949851066
90149124433812625089311385517468210763098353638
95156225603995655093591451918306220873246956210
100163426774178684997871518419143230983395558782
1251991326350928348119281850623332281514138371642
1502349384860069846140702182727520332044881284502
17527064434692011345162112514931708382575624097362
200306450207834128431835228471358964331163669110222
225342156058748143422049331793400844836471097123082
250377961919662158402263535115442725341778525135943
2754136677710576173392477638437484605847085954148803
3004493736211490188372691741759526486352393382161663
32548517948124042033629058450805683668577100811174523
35052088534133182183431199484026102573630108239187383
37555669119142322333333341517246521378683115668200243
40059239705151462483135482550466940183736123096213103
425628110291160602633037623583687358988790130525225963
450663810876169742782939764616907777793843137953238823
475699611462178882932741905650128196598896145382251684
5007353120481880230826440476833386153103949152810264544
5257711126331971632324461887165590341109002160239277404
5508068132192063033823483297497794530114056167667290264
5758425138052154435321504707829998718119109175096303124
60087831439022458368205261281621102906124162182524315984
62591401497623372383185475384943107094129215189953-
65094981556224286398175689488265111282134269197381-
67598551614725200413155903591586115470139322204810-
700102131673326114428146117694908119658144375212238-
725105701731927028443126331898230123846149428219666-
7501092817904279424581165459101552128035154482227095-
7751128518490288564730967600104874132223---
8001164319076297704880869741108196136411---
8251200019661306845030671883111518140599---
8501235720247315985180574024114839144787---
8751271520833325125330376165118161148975---
9001307221418334265480278306121483153163---
9251343022004343405630080447124805157351---
9501378722589352545779982589128127161540---
9751414523175361685929784730131449165728---
10001450223761370826079686871134771169916---

ASME SECTION VIII STEAM – CAPACITIES (U.S., LB/HR) – FLOW COEFFICIENT = 0.878

Orificearea,in2
FGHJKLMNPQ
Set pressure (psig)(0.307)(0.503)0.785)(1.287)(1.839)(2.853)(3.597)(4.340)(6.380)(11.045)
15454744116119032719421853196417943316331
205238571338219431354863613273981087618828
255939711516248535515508694583801231821325
3066210851693277639666153775893611376123822
35739121018883096442468638653104401534726569
40815133520843416488175739547115191693429316
458911460227937365338828210442125991852132063
509681585247440565796899211336136782010734810
5510441710266943766253970112231147572169437557
60112018352864469667111041113125158372328140303
65119719613060501671681112014020169162486743050
70127320863255533676251183014915179952645445797
75134922113450565680831253915809190752804148544
80142623363645597785401324916704201542962751291
85150224613841629789971395817598212333121454037
90157825864036661794551466818493223133280156784
95165527114231693799121537719387233923438759531
1001731283644267257103691608720282244713597462278
1252113346254028857126561963424755298684390776012
15024954087637910458149432318229227352655184189746
175287647137355120581723026730337004066159774103480
200325853388331136581951630277381734605867707117214
225364059649307152592180333825426465145575641130948
2504022658910283168592409037372471185685183574144682
2754403721411259184592637640920515916224891507158417
3004785784012235200602866344468560646764599441172151
32551678465132112166030950480156053773041107374185885
35055489091141872326033237515636500978438115307199619
37559309716151642486135523551116948283834123241213353
400631210342161402646137810586587395589231131174227087
425669410967171162806140097622067842894628139107240821
4507075115931809229662423846575382900100024147041254555
4757457122181906831262446706930187373105421154974268289
5007839128442004432862469577284991846110818162907282023
5258221134692102034463492447639696319116214170840295758
55086021409521996360635153179944100791121611178774309492
57589841472022973376635381783491105264127008186707323226
60093661534523949392645610487039109737132404194640336960
62597481597124925408645839190587114210137801202574-
650101291659625901424646067894134118682143198210507-
675105111722226877440656296497682123155148594218440-
7001089317847278534566565251101230127628153991226374-
7251127518473288294726567538104777132101159388234307-
7501165619098298054886669824108325136573164784242240-
7751203819724307825046672111111872141046---
8001242020349317585206674398115420145519---
8251280220975327345366776685118968149992---
8501318321600337105526778971122515154464---
8751356522226346865686781258126063158937---
9001394722851356625846883545129610163410---
9251432923477366386006885832133158167883---
9501471024102376146166888118136706172355---
9751509224727385916326990405140253176828---
10001547425353395676486992692143801181301---

ASME SECTION VIII/AIR/GAS STEAM – CAPACITIES (U.S., SCFM) – FLOW COEFFICIENT = 0.878

Orificearea,in2
FGHJKLMNPQ
Set pressure (psig)(0.307)(0.503)0.785)(1.287)(1.839)(2.853)(3.597)(4.340)(6.380)(11.045)
1516226541367796815021893228433585813
20186305476781111617312183263338716702
25211346540885126419612472298343857591
30236386603988141221902762333248988480
352634316721102157524433080371654639457
4029047574212161737269533984100602810435
4531752081113301900294837174485659211413
5034456488114442063320140354869715712390
5537260995015582226345343545253772213368
60399653102016722389370646725637828714346
65426698108917862551395849906021885115324
70453742115919002714421153096405941616301
75480787122820132877446356276790998117279
805088311298212730404716594671741054618257
855358761367224132034968626475581111119234
905629211437235533655221658279421167520212
955899651506246935285474690183261224021190
10061610101576258336915726721987111280522168
125752123219233153450569898811106311562927056
1508881455227037225319825210403125521845331945
17510241677261842926133951411995144732127636833
200116019002965486269471077713588163942410041722
225129621233313543177611204015180183152692446611
250143123453660600185751330316772202362974851499
275156725684008657193891456518364221573257256388
3001703279143557140102031582819956240783539661276
3251839301347037710110171709121548259993821966165
3501975323650508279118311835423140279204104371054
3752111345953978849126441961624732298414386775942
4002247368157459419134582087926324317624669180831
4252383390460929988142722214227916336824951585719
45025194126644010558150862340529508356035233990608
47526544349678711128159002466731100375245516295497
500279045727135116971671425930326923944557986100385
525292647947482122671752827193342844136660810105274
550306250177830128371834228456358764328763634110162
575319852408177134061915629718374684520866458115051
600333454628524139761997030981390604712969282119940
625347056858872145452078432244406534905072105-
650360659079219151152159833507422455097174929-
675374161309567156852241234770438375289277753-
700387763539914162542322636032454295481280577-
7254013657510262168242404037295470215673383401-
7504149679810609173942485438558486135865486225-
775428570211095717963256683982150205---
800442172431130418533264824108351797---
825455774661165219103272964234653389---
850469376891199919672281104360954981---
875482879111234620242289244487256573---
900496481341269420811297384613458165---
925510083561304121381305514739759757---
950523685791338921951313654866061349---
975537288021373622520321794992362941---
1000550890241408423090329935118564533---

SELECTION GUIDE

Example:300LLJ01-AS0020
Model

300

600
Connection type

L       300# flange x 150# flange (model 300)

N       600# flange x 150# flange (model 600)
Orifice

F       L

G       M

H       N

J       P

K       Q
Connection size

F       1¼" inlet x 1½” outlet

G       1½" inlet x 2½” outlet

H       2" inlet x 3” outlet

J       2½" inlet x 4” outlet

K       3" inlet x 4” outlet

M       4" inlet x 6” outlet

P       6" inlet x 8” outlet
Variation

01       Catalog standard
Design revision

Indicates non-interchangeable revision. dash (-) if original design
Valve service

A       Steam ASME section I

K       Air ASME section VIII

L       Steam ASME section VIII
Spring material

S       Steel (to 750°F)

F       Alloy steel high temperature (to 800°F)
Set pressure

15 psig (0015) to 740 psig (0740) - model 300

15 psig (0015) to 1000 psig (1000) - model 600
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