Terofox provides one stop service in diversity of valves’ procurement and ODM & OEM manufacturing, all our products and quality management procedures are in accordance with ISO 9001. Our wide range of products includes:
API608 Floating Stainless Steel Ball valve
API6D Trunnion Ball valves.
API 594 Dual plate check valves.
Concentric Butterfly Valves (Pins and Pinless / PTFE lining )
But our main focus is our “Special Product Line” in Taiwan that includes:
Sanitary Valves.
Cryogenic Valves: Used in the transmission of extreme low temperature services.
Special Alloy Valves: Some of the Materials we offer are Alloy 20, Monel, Hastelloy, Duplex/ Super Duplex Stainles Steel, Titanium and more.
Dead-man Return Ball Valves: Spring Return Handle that decreases the Torque for easier use.
Fugitive Emission ISO15848-1 certified : Safty is a trend nowadays, our low emission valve meets ISO15848-1 for eliminating fugitive emission
API607 6th Edition / ISO10497:2010 Fire Safe Approval ball valves - Flange Ball valves ( TF-20FS, TF-20DFS ), Trunnion Mounted Ball Valve ( TF-40FS, TF-44FS ) and high performance Ball Valve (EB-321DFS), Wafer Type Ball Valve ( TF-10MFS)
BS6363 Cryogenic Ball Valves
Marine Certified valves
Metal Seated Ball Valves : up to 600 Degree Celsius
3000psi/6000psi/10,000psi Ball Valves
In order to satisfy variety of requirements, we have applied for certificates such as ISO 9001, CE ( PED 97/23/EC ), API607 6th Edition Fire Safe Approved for floating and trunnion mounted ball valve, ABS PDA certificate, TA-Luft, ISO15848 for Fugitive Emmission applications, AD-2000, as well as foundry approvals: DNV, BV, LR certifications.
Our mission is to assist our customers in obtaining the best possible solutions to their requirements and needs, at the most advantageous prices, without compromising on delivery or quality. With this in mind, we believe in developing long terms relationships, based on mutual trust and honesty.
RSA Conference Exhibitor List 2024 - Exhibitors Data
Terofox dual check, butterfly (rev.00)
1.
2. What distinguishes Terofox Valves is the
fact that manufacture industrial valves,
Employing dedicated engineers,
quality assurance personnel, working
on our behalf at all our points of
manufacture. In this way we are able
to make sure that all our customers’
needs and concerns are consistently
and professionally met and monitored
on an ongoing basis.
Our dedicated team, with many
years of experience, specialized in
providing own valves and sourcing
solutions for valves and fittings in both
Taiwan and China. This includes ODM
and OEM, designed engineering for
our customers. Products sourced,
service the chemical, petrochemical,
process control, water purification and
mechanical engineering requirements
of our customers all over the world.
Terofox provides one stop service in
diversity of valves’ procurement too.
Not only our own API594 dual plate
check valve and industrial ball valves,
but also including the valves among
API600, API602 and API603 Gates,
Globes and Check Valves, Knife Gate
Valves, Butterfly Valves, API6D Trunnion
mounted Ball Valves, Corrosive PFA
valves, Strainers, safety relief valves,
hygienic components, plug valves as
ABOUT
1 www.terofox.com
3. We Guarantee our Customers
With this in mind, we believe in developing long-term relationships, based on mutual trust and
honesty. Thinking ahead and Quick response to customers are our permanent goals in Terofox.
So we do believe “ The Right Valve, For The Right Application“
Free
download
of all
detailed
drawings
online
Inventory
Status
Automation
Service
One-Stop
Shop Service
Engineering
expertise
100%
Quality
assurance
Cost-
Efficient
on valve
procedures
1-year
warranty
Short
Delivery
2
well as fittings, flanges, nuts and bolts are all available on requests. Our manufacturers all adhere to
quality management procedures as laid down in ISO 9001 and PED 97/23/EC approvals.
Valves are available in following materials. Carbon steel LLC, LCB, WCB, WC6 to Austenitic Stainless
Steel CF8 (SS304), CF8M (SS316), CF3M (SS316L), Duplex, Alloy 20, Money and Hastelloy C. Our
Cooperative foundry has certified by ISO 9001 which is our minimum approval in allocating the
foundry.
Based in Taiwan, our mission, as a team of dedicated professionals, is to assist our customers in
obtaining the best possible solutions to their requirements and needs, at the most advantageous
prices, without compromising on delivery or quality.
4. 3 www.terofox.com
Benefits Of Daual Plate CheckValves
Product Summary
Appendix
Inspection Standards
Inspection Precaution
Inspection Dimensions
API609 / BS5155 Concentric ButterflyValve
Other Small Stainless Steel Gate, Globe
Check In Screw Ends
04
06
09
17
19
21
30
39
INDEX
3 www.terofox.com
5. 4
Integration / Dedication / Solution
Benefits Of Dual Plate
Check Valves
Product Characteristics
Water Hammer Prevention
Water hammer commonly occurs when
a valve is closed suddenly at an end of
a pipeline system, and a pressure wave
propagates in the pipe. Terofox Check Valves
have quick response by closing discs. It
decreases the frequency of water hammer
condition.
Non Slamming
When swing check valve is closed, the reversal
of fluids in the pipeline will slam the plates
(discs) against its seal, and would cause the
noise, shortening the valve service life in many
cases. Terofox Dual Plate Check Valves have
outstanding springs against the plates (discs)
to resist the reversal of fluids, causing the
plates(discs) to close slightly.
Simplicity Installation
Most of traditional swing check valves are
heavy and closed improperly. Also they take
more space than dual plate check valves.
Dual plate check valves are able to be
installed in any position, horizontal or vertical.
Why Choose Our Dual Plate Check Valves ?
Small space available, easy installation, quick closing to reduce
water hammer
Cost-efficient
Diversity of connections ( Wafer, Lug, Flange )
Wall thickness is according to B16.34 / API594
Quality assurance
High CV & Low Pressure Drop
Terofox Dual Plate Check Valves take
advantage of lower pressure drop with
functional operations.
Seat Leakage
Terofox Valves are generally tested in
compliance with international standard such
as API598 which has specified the permission
of leakage rate in 3 c.c./inch of bore /mm
( in hydraulic test ) by metal to metal check
valves. 700 c.c. leakage rate of permission by
air test.
Sour Gas Service
Terofox Dual Plate Check Valves are able
to meet the requirement of NACE MR0175
treatment.
6. 5 www.terofox.com
No. PARTS Q'TY REMARK
1 BODY 1 -
2 PLATE 2 -
3 SPRING -
2"~5"-1pc,
6"~20"-2pcs,
24 and large-4pcs
4 HINGE PIN 1 -
5 STOP PIN 1 -
6 BODY BEARING 2 -
7 PLATE BEARING 2 -
8 SEAT 1 -
9 CARRIER 2 -
10 SET SCREW 2 -
11 EYEBOLT -
6"~20"-1pcs,
24"~40"-2pcs
No. PARTS Q'TY REMARK
1 BODY 1 -
2 PLATE 2 -
3 SPRING -
2"~5"-1pc,
6"~20"-2pcs,
24 and large-4pcs
4 HINGE PIN 1 -
5 STOP PIN 1 -
6 ROBBER PIPE 2 -
7 BODY BEARING 2 -
8 PLATE BEARING 1 -
9 SEAT 2 -
10 RETAINER 2 A182
11 RETAINER - A105
12 EYEBOLT -
6"~20"-1pcs,
24"~40"-2pcs
Design
Range Of Material
Our Dual Plate Check Valves are subject to API594 or our own design. Available with wafer, lug,
flange or butt-weld ends. It features two half-discs, that pivot on a center post.
Standard body material included grade of A126 class B ( cast iron ), A536 Ductile Iron, A216 WCB,
A352 LCB, and ASTM A351 austenitic stainless steel, alloy 20, super duplex, Hastelloy C , Monel
grade materials for various applications.
Exploded Views between Dual Plate Check Valves and
Retainerless Type Dual Plate Check Valve
Dual Plate Check Valve Characteristics Retainerless Type Dual Plate Check Valve
MATERIALS LISTMATERIALS LIST
Benefits Of Dual Plate
Check Valves
7. 6
Integration / Dedication / Solution
DVC-100
Wafer Type Dual Plates ( Flaps ) Check Valves
Features For Steel
Features For Cast Iron
Size:11/2"-60"( DN40 ~ DN 1500 )
Body Material:A126 Class B / A536 65-45-12
Seat:EPDM/NBR/VITON
Pressure Rating:125#/150#/300#/PN6/PN10/PN16/JIS
5K / JIS 10K
Body Material:WCB / CF8 / CF8M / 1.0619 / 1.4308 /
1.4408 / SCPH2 / SCS13 / SCS14
Seat:EPDM/NBR/VITON
Pressure Rating:150# / 300# / 600# / 900# / 1500# /
2500#, PN6 / PN10 / 16 / PN25 / 40 /
PN50 / PN110 PN150 / PN260 / PN420 /
JIS 5K JIS 10K
Model options:DVC-102 Full Rubber Lining Type
DVC-110
Lug Type Dual Plates ( Flaps ) Check Valves
DVC-102
Features
Size:11/2"-36"( DN40 ~ DN 900 )
Body Material:WCB/CF8/CF8M /1.0619/1.4308/1.4408/
SCPH2/SCS13/SCS14
Seat:EPDM/NBR/VITON/Metal To Metal
Pressure Rating:150#/300#/600 / PN6/PN10/16/
PN25/40/PN50 / JIS 5K / JIS 10K
Model options:DVC-111 Full Lug Type
DVC-112 Lug Lining Type
DVC-113 Full Lug Lining Type
PRODUCT SUMMARY
DVC-111 DVC-112 DVC-113
8. 7 www.terofox.com
DVC-120
DVC-160
Features
Features
Size:11/2"-36“( DN40 ~ DN 900 )
Body Material:WCB/CF8/CF8M/1.0619/1.4308/1.4408/
SCPH2/SCS13/SCS14
Seat:EPDM/NBR/VITON/Metal To Metal
Pressure Rating:150#/300#/600#/PN6/PN10/16/
PN25/40/PN50/JIS 5K / JIS 10K
Model options:DVC-121 Double-Flange Full Rubber
Seat Type
Size:11/2"-60“( DN40 ~ DN1500 )
Body Material:WCB/CF8/CF8M/1.0619/1.4308/1.4408/
SCPH2/SCS13/SCS14
Seat:EPDM/NBR/VITON/Metal To Metal
Pressure Rating:150#/300#/600#/900#/1500#/2500#/
PN6/PN10/16/PN25/40/PN50/PN110/
PN150/PN260/PN420/JIS 5K / JIS 10K
End Connections:Wafer, Lug, Flange
Retainerless Type Dual Plates (Flaps) Check Valve
Flange Type Dual Plates (Flaps) Check Valve
DVC-131
Features
Size:11/2"-24“( DN40 ~ DN600 )
Body Material:WCB/CF8/CF8M/1.0619/1.4308/1.4408/
SCPH2/SCS13/SCS14
Seat:EPDM/NBR/VITON/Metal To Metal
Pressure Rating:150#/300#/600#/900#/1500#/2500#/
PN6/PN10/16/PN25/40/PN50/PN110/
PN150/PN260/PN420/JIS 5K/JIS 10K
Single Door Solid Type Swing Check Valve
PRODUCT SUMMARY
9. 8
Integration / Dedication / Solution
DVC-130
Features
Size:11/2"-24“( DN40 ~ DN600 )
Body Material:ASTM A351 CF8M
Seat:EPDM/NBR/VITON/Metal To Metal
Pressure Rating:150#/300#/600#/PN10/PN16/PN25/
JIS10K
Single Door Swing Check Valve
10. 9 www.terofox.com
APPENDIX
Body Material Range
ASTM A126 Class B A536 65-45-12 A216 WCB A217 WC6 A352 LCB A352 LCC
A351 CN7M A351 CF8 A351 CF8M A351 CF3M A351 CG8M A351 CF8C
Body Material Range
A352 LC1 A217 C5 A217 C12 A352 CA6NM A743 CA15
A890 Gr. 4A B367 C2 B584 C83600 B148 C95800 -
End Connection
Flate Face F.F. ( 63 AARH )
Raised Face R.F. ( 125 - 250AARH )
Ring Type Joint RTJ
Spring Material
SUS 316
Inconel X750
Basic Design Standard
API-594
Manufacturer's
Pressure-
Temperature
Standard
ASME-B16.1
ASME-B16.34
ASME-B16.42
ISO-7005/1-2
JIS-B2201
Flanged Face
Standard
MSS-SP6
ASME-B16.1
ASME-B16.5
ISO-468
JIS-B 2238
JIS-B 2239
Inspection
Standard
API-598
ASME-B16.34
ISO-5208
JIS-B 2003
JIP-7S-39-96
Thickness
Standard
API-594
Manufacturer's
Face To Face
Standard
API-594
API-6D
ISO-5752
EN-558-1
JIS-B 2002
Marking
Standard
API-594
MSS-SP25
ISO-5209
JIS-B2004
Flanged Suit
Standard
API-605
MSS-SP44
AWWA-C207
ASME-B16.1
ASME-B16.5
ASME-B16.42
ISO-7005/1
ISO-7005/2
BS10-TableA/D/E/F
JIS-B2238
JIS-B2239
JPI-7S-15-93
Design Standards
11. 10
Integration / Dedication / Solution
Size Cv Kv
11/2" & 2" 54.5 46.6
2-1/2" 84.6 72.3
3" 137.5 117.5
4" 283.1 242.0
5" 491.3 491.9
6" 812.1 694.1
8" 1499.5 1281.6
10" 2587.3 2211.4
12" 4214.8 3602.3
14" 5547.3 4841.3
16" 7549.7 6452.7
18" 10548.7 9016.0
20" 13325.6 11390.0
24" 21500.0 18376.0
26" 26400.0 22564.0
28" 29900.0 25555.0
30" 38400.0 32821.0
32" 46500.0 39744.0
36" 62000.0 52992.0
40" 84500.0 72222.0
42" 91300.0 78034.0
48" 145100.0 124017.0
Based upon ISA-S75.01-1985 Q=Flow X=Ratio of Pressure Drop ∆ P
For tubulent flow Liquid:U.S. gall/minute to absolute inlet Pressure P1
Gas:standard ft3/hour Z=Gas compressibility factory
For Liquids Cv-Valve co-efficient (=1 for an ideal gas)
Q=Cv*( ∆ P/Gf) ½ ∆ P=(P1-P2)Pressure Drop psi M=Molecular weight
Qmax of R P1=Inlet Pressure psia α1=Specific weight, upstream
0.7*Cv*[(P1-FfPv)/Gf]½ P2=Outlet Pressure psia conditions(lb/ft3)
Vaporising liquid Gf=Specific Gravity of Fluid Ff=Liquid critical pressure ratio
W=63.3*Cv*( ∆ P*α1) ½ e.g. water=1;@60 ℉ ;1 atm Factor
Gg=Specific Gravity of gas, Ff=0.96-0.28(Pv/Pc)½
For Gases & Vapors e.g. gas =1;@60 ℉ ;1 atm Pv=Absolute vapor pressure of
Q=1360*Cv*P1*Y*[X/(Gg*T1*Z)]½ T1=Absolute inlet temperature liquid at inlet temperature in
W=19.3*Cv*P1*Y*[(X*M)/(T1*Z)]½ W=Flow lbs/hour psia.
Y=Expansion factor (limits Pc=Absolute thermodynamic
between 1 & 0.67 criical pressure
Cv Pressure Drop Formula
Cv & Kv Values (Cv=1.17*Kv)
17. 16
Integration / Dedication / Solution
1. 1 bar =0.1MPa.
2. ISO PN25 and ISO PN40 flanges manufactured in grey cast iron are limited to ISO 185 grade 250.
1. 1 bar =0.1MPa
ISO 7005/2 MAXIMUM NON-SHOCK WORKING PRESSURE: BAR (CAST IRON)
Nominal
Pressure
ISO PN
Material Temperature ℃
ISO ASTM -10 to 65 120 150 180 200 230 250 300
2.5 185 --- 2.5 2.5 2.5 2.1 2 1.9 1.8 1.5
6 185 --- 6 6 6 5 4.8 4.4 4.2 3.6
10 185 --- 10 10 9 8.4 8 7.4 7 6
16 185 --- 16 16 14.4 13.4 12.8 11.8 11.2 9.6
20:
(<DN300)
---
A126
Class A
12.1 10.3 9.6 8.6 --- --- --- ---
(<DN300) 185
A126
Class B
13.8 12.1 11.4 10.3 9.8 8.6 --- ---
(300<DN<600) 185
A126
Class B
10.3 8.6 7.6 6.9 --- --- --- ---
(600<DN<900) 185
A126
Class B
10.3 5.9 3.4 --- --- --- --- ---
25 185 --- 25 25 22.5 21 20 18.5 17.5 15
40 185 --- 40 40 36 33.6 32 29.6 28 24
50:
(<DN300)
---
A126
Class A
27.6 23.4 21.4 18.3 17.7 --- --- ----
(<DN300) 185
A126
Class B
34.5 28.6 25.9 23.1 20.8 17.2 --- ---
(300<DN<600) 185
A126
Class B
20.7 17.9 16.6 15.2 14.1 --- --- ---
(600<DN<900) 185
A126
Class B
20.7 13.8 10.3 6.9 --- --- --- ---
ISO-7005/2 MAXIMUM NON-SHOCK WORKING PRESSURE:BAR (DUCTILE IRON)
Nominal
Pressure
ISO PN
Temperature ℃
-10 to 120 150 200 250 300 350
10 6 5.8 5.5 5.2 4.8 4.2
16 10 9.7 9.2 8.7 8 7
20 16 15.5 14.7 13.9 12.8 11.2
25 25 24.3 23 21.8 20 17.5
40 40 38.8 36.8 34.8 32 28
18. 17 www.terofox.com
INSPECTION
STANDARDS
ASME B16.34
API598
Shell Test
Marerial Pressure(PSI)
ASTM 150LB 300LB 600LB 900LB 1500LB 2500LB
A216 Gr.WCB 450 1125 2225 3350 5575 9275
A217 Gr.WC6 450 1125 2250 3375 5625 9375
A352 Gr.LCB 400 1050 2100 3150 5225 8700
A352 Gr.LCC 450 1125 2250 3375 5625 9375
A351 Gr.CF8 425 1100 2175 3250 5400 9000
A351 Gr.CF8M 425 1100 2175 3250 5400 9000
A351 Gr.CF3M 425 1100 2175 3250 5400 9000
Seat Test
Marerial Pressure(PSI)
ASTM 150LB 300LB 600LB 900LB 1500LB 2500LB
A216 Gr.WCB 325 825 1650 2450 4100 6800
A217 Gr.WC6 325 825 1650 2475 4125 6875
A352 Gr.LCB 300 775 1550 2300 3825 6375
A352 Gr.LCC 325 825 1650 2475 4125 6875
A351 Gr.CF8 325 800 1600 2400 3975 6600
A351 Gr.CF8M 325 800 1600 2400 3975 6600
A351 Gr.CF3M 325 800 1600 2400 3975 6600
A126
Class-B
Shell Test (PSI)
A536
65-45-12
Shell Test (PSI)
A126
Class-B
Seat Test (PSI) A536
65-45-
12
Seat Test (PSI)
125LB 250LB 150LB 300LB 125LB 250LB 150LB 300LB
2”~12” 350 875
ALL SIZES 400 975
2”~12” 200 500
ALL SIZES 250 64014”~24” 265 525 14”~24” 150 300
26”~60” 265 --- 26”~60” 150 ---
Maximum Allowable Leakage Rates For Closure Tests
1.The maximum permissible leakage rate shall be 0.18 cubic inch (3cubic cenumeters)per minute per inch of
nominal pipe size.
2.The maximum permissible leakage rate shall be 1.5 standard cubic feet (0.042cubic meter) of gas per hour
per inch of nominal pipe size.
19. 18
Integration / Dedication / Solution
ISO 5208
1.The rate or rates of seat test leakage for each valve type shall be as specified in the valve product standard.
2.These leakage rates only apply when discharging to atmosphere.
3.Leakage rate1 is intended to apply to metal seated valves producted for internal stock,sale via a stockist,or
a warehousing opration.
4.Leakage rate2 is intended to apply to metal seated valves on more critical services.
5.Leakage rate3 is intended to apply,for example,to"elastomeric or polymeric"(soft seat) seated valves.
Seat Test
DN PN Seat Test
Up to and including All 1.1*maximum permissble
working pressure at 20℃
liquid or 6 bar(600 KPa) gas
DN100 up to and including DN200
Up to and including PN50
PN100 and greater
1.1*maximum permissble
working pressure at 20℃
liquid
DN250 and greater All
Maximum Allowable Seat Test Leakage Rate
Seat Test Leakage Rates1)2)
Pate 13) Pate 24) Pate 35)
0.1mm3/s*DN When Teating With Liquid 0.01 mm3/s*DN When Teating With Liquid No Visible Leakage For The
Duration Of The Test30mm3/s*DN When Teating With A Gas 0.3mm3/s*DN When Teating With A Gas
Shell Test
A shell test using fiuid shall be performed at a minimum pressure of 1.5 times the maximum permissible working pressure
(MPWP) at 20℃ ,or,for valves up to and including DN50 in the pressure range up to and incliding PN50 using gas ata test
pressure of 6 bar (600 KpPa)
20. 19 www.terofox.com
FLOW
FLOW
The valve must be installed as following to work properly in a vertical pipe line. It has to set the rib of wafer
check valves vertically.B
The pipes connect the dual wafer check valves have to be in compliance with flow direction as indicated
on body valve.A
INSTALLATION
PRECAUTION
21. 20
Integration / Dedication / Solution
PLATE
6D~8D
6D~8D
As long as
possible
PLATE
It's not allowed to install a reducer in front of or behind the wafer check valves, needing a space of 6~8
times at least the valve diameter (6~8D) or more.C
Leaving a space as long as possible between elbow and wafer check valve if the wafer check valves
installed nearby the elbow ( no recommended ); otherwise the plate will be opened incorrectly in the
downstream of pipeline.
D
D
D
L
H
L
H
L
22. 21 www.terofox.com
Carbon & Stainless Steel Materials Installation
Dimensions: Suit For ASME / MSS / API Flanges
INSTALLATION
DIMENSIONS
ØA
ØB
E
1516,49
42
25,5
16
25,5
16
Model:DUAL PLATE WAFER STYLE CHECK VALVE
Design:API - 594
Stainless Steel Wall Thickness:B16.34 for class 150 & class
300, API594 for class 600
and above
Carbon Steel Wall Thickness:API594
Face To Face:API - 594 / API - 6D
Inspection:API - 598 / ASME - B16.34
Suit Flanged For:ASME - B16.5 / MSS SP - 44 / API - 605
Size
(inches)
End
Facing
Pressure
Rating
A
mm
B
mm
E
mm
Dia. of
Bolt
Circle
(P.C.D)
Stud
Selection
Stud
No.
Stud
Dia.
1-1/2”
RF 150 86
60
43 98.6 4 1/2”
RF/RJ-20 300-600 95 60 114.3 4 3/4”
RF/RJ-20 900-1500 98 70 124 4 1”
RF/RJ-23 2500 117 70 146.1 4 1-1/8”
2"
RF 150 104
60
60 120.7 4 5/8”
RF/RJ-23 300-600 111 60 127 8 5/8”
RF/RJ-24 900-1500 142 70 165.1 8 7/8”
RF/RJ-26 2500 146 70 171.5 8 1”
2-1/2”
RF 150 123
73
67 139.7 4 5/8”
RF/RJ-26 300-600 130 67 149.4 8 3/4”
RF.RJ-27 900-1500 165 83 190.5 8 1”
RF/RJ-28 2500 168 83 196.9 8 1-1/8”
31. 30
Integration / Dedication / Solution
API609 / BS5155
Concentric Butterfly Valve
Inspection and Test
Concentric Butterfly Valves, Rubber
1. Butterfly Valves shall be tested as per ANSI B16.34, MSS SP-61, API598, ISO 5208 Terofox would organize the
inspection according to API 598 if customers didn t require prior to order.
2. Butterfly Valves should be seated test as per MSS SP-61 or ISO 5208 with no leakage occurrence for resilient
seated.
3. If butterfly Valves are required by stem 17-4PH material, Terofox will test in compliance with MSS SP-61 or ISO
5208 only
Model Type Size
Allowable
Pressure
Body Material Seat Operator
BFV-700 Wafer 1 1/2" ~ 48"
Class 125, Class
150, PN10, PN16
Cast Iron ( ASTM
A 126 Class B ), DI,
WCB, CF8, CF8M
EPDM, NBR, VITON,
PTFE
Lever / Gear
Box / Pneumatic
Actuator /
Electronic
Actuator
BFV-701 Lug 1 1/2" ~ 24"
Class 125, Class
150, PN10, PN16 ,
JIS5K, JIS10K
Cast Iron ( ASTM
A 126 Class B ), DI,
WCB, CF8, CF8M
EPDM, NBR, VITON,
PTFE
Lever / Gear
Box / Pneumatic
Actuator /
Electronic
Actuator
BFV-702 Flange 1 1/2" ~ 48"
Class 150, PN10,
PN16, JIS5K, JIS10K
Cast Iron ( ASTM
A 126 Class B ), DI,
WCB, CF8, CF8M
EPDM, NBR, VITON,
PTFE
Lever / Gear
Box / Pneumatic
Actuator /
Electronic
Actuator
A butterfly valve is a valve which can be used for isolating or regulating flow, Operation is similar to that of a
ball valve, which allows for quick shut off. Butterlfy valves are currently favoured by customers due to lower
cost compared to other type of valves as well as bring lighter in weight. It means easy installation with simple
operation. When the valve is fully open, the disc is rotated a quarter turn so that it allows an almost unrestricted
passage of the fluid. Terofox has several kinds of butterfly valves, each adapted for different pressure,
application and different usage.
BFV-700 BFV-701 BFV-702
※Without pin design on disc is available.
※Aluminum Lever is available.
32. 31 www.terofox.com
API609 / BS5155
Concentric Butterfly Valve
Why Choose Our Butterfly Valves ?
Technical Data
Simple and compact contrcution, quick 90 degree on-off operation. Minimized
operating torque value, with energy saving.
Bubble-tight sealing with no leakage for soft seat butterfly valve.
The connection of driven part conforms to ISO 5211.
Wide selection of materials, applicable for various medium.
The valve body and disc are precisely machined which results in low operating torque
and long service life and reliability.
Could be disassembled, material-specific recycling possible.
Could be installed at the end of pipe for lugged type butterfly valve.
Terofox Butterfly Valve is made with a "Phenolic Backed" not "Soft Backed Seat".
Normal diameter 1 ½” ~ 48” ( DN40 ~ DN1200 )
Face to face
API609
DIN 3202 K1
ISO 5752
BS 5155
EN558 Series
Flange accommodation
AS 2129 Table D or E
BS 10 D or E
JIS 5K/10K
ASME B16.1 125LB
ASME B16.5 150LB
BS 4505 PN6/PN10/PN16
DIN 2501 PN6/PN10/PN16
ISO 7005 PN6/PN10/PN16
Design Standard
API609
BS 5155
EN 593
MSS SP-67
Top Flange ISO 5211
Temperature Range -20℃ ~200℃ ( Depending on pressure, medium and material )
Test inspection
API 598
EN 12266-1
Suitable Medium Fresh water, Waste Water, Sewage, Seawater, Air, Vapor, Oil…..etc.
Options Without Pin Design is available
33. 32
Integration / Dedication / Solution
There are two kinds for seat : phenolic backed seat soft back seat.
Differences Of Backed Seat For Concentric Butterfly Valve
Exploded Views For Our Concentric Butterfly Valve
Seat Selection Guide For Butterfly Valve
Seat Material
Temp ℃
Min. Max.
EPDM -10 120
NBR -10 80
VITON -10 200
PTFE -20 160
The phenolic backed seat is non-
collapsible, streth resistant, blowout-
prood and easily replaceble.
The soft backed valve has a wider seal
section between seat and flange while
mounted, but soft backed seat is subjet
to distortion during installtion and closing
and is contributed to shaft leakage and
high torque.