O-Type Reduced Port Ball Valves are designed for reliable flow control in various industrial applications. Featuring a streamlined flow path with a reduced bore, these valves ensure precise throttling, lower flow rates, and minimized turbulence. Constructed from high-quality materials such as WCB, CF8, or CF8M, excellent corrosion resistance and durability even when you apply it under high pressure and high temperature conditions. Ideal for pipelines where full flow is not required, O-type ball valves are a cost-effective solution for chemical processing, water treatment, and general industrial use.
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Premium O Type Ball Valves – Reliable Flow Control for Demanding Applications
This O-type ball valve is a quarter-turn reduced port on-off valve, mainly used for medium cut-off control. This series of ball valves is suitable for tight cut-off, fast cut-off, and two-way medium cut-off control. It is matched with pneumatic actuators and electric actuators and is widely used in process automatic control systems with high automation requirements in papermaking, chemical industry, food processing, petrochemical industry, etc.
With their streamlined flow path and smaller inside diameter, our O-type reduced-bore ball valves are ideal if you are regulating flow in a piping system that does not require full-bore flow. These valves are precision-engineered and industrially reliable to help you streamline your process, whether you are handling gas, liquid or steam.
Ready to Improve Your Flow Control? Our team is here to help you select the right configuration and material for your specific application. Submit an inquiry or request a quote today – and let’s make your system more efficient, safe, and reliable.
GB/T 9113, HG/T 20592, HG/T 20615, ASME B 16.5, EN1092, JIS B 2220:2004
Temperature Range
-29°C to 400°C
Leakage Class
GB/T 4213, FCI 70-2 Class V/VI
Available Accessories
Limit switch, solenoid valve, positioner, air filter regulator, etc.
Actuation Modes
Manual, Pneumatic, Electric, Electro-hydraulic
Connection Types
Flanged, Threaded, Welded, or Customized
Standards
ISO, ANSI, DIN, API, GB
Main Components & Materials
No.
Part Name
Material
1
Body
WCB
CF8
CF8M
2
Double-End Stud
35CrMOA
304
316
3
O-ring
Nitrile Rubber
Nitrile Rubber
Nitrile Rubber
4
Seat
20Cr13 + STL
304 + STL
316 + STL
5
Middle Gasket
Nitrile Rubber/Graphite
Nitrile Rubber/Graphite
Nitrile Rubber/Graphite
6
Ball
CF8 + Cr
CF8 + Cr
CF8M + Cr
7
Spring
316
316
316
8
Bonnet
WCB
CF8
CF8M
9
Washer Set
Q235
304
304
10
Nut
45
304
316
11
Key
20Cr13
304
316
12
Upper Stem
20Cr13
304
316
13
Bushing
PTFE
PTFE
PTFE
14
O-ring
Nitrile Rubber
Nitrile Rubber
Nitrile Rubber
15
Anti-Blowout Sleeve
WCB
CF8
CF8M
16
Stud Bolt
20Cr13
304
316
17
Packing Set
PTFE
PTFE
PTFE
18
Gland Flange
WCB
CF8
CF8M
19
Double-End Stud
25
304
304
20
Nut
25
304
304
21
Washer
25
304
304
22
Lower Stem
20Cr13
304
316
23
Washer
25
304
316
24
Back Cover
WCB
CF8
CF8M
25
Washer
PTFE
PTFE
PTFE
26
Stud
25
304
316
Why Choose Our O Type Ball Valves?
Precision Flow Control
Our O-type reduced port design offers stable and accurate flow regulation, reducing fluid velocity and minimizing turbulence—ideal for systems that don’t require full flow.
Fast and Easy Operation
The 90-degree quarter-turn operation allows for quick shutoff or startup with minimal effort – ideal for systems requiring fast response.
Leak-Tight Sealing
A precision-machined ball and resilient soft seats ensure tight shutoff, even after thousands of cycles. You can count on reliable sealing performance.
Built to Withstand Harsh Media
Available in WCB, CF8, CF8M, and CF3M body options with PTFE, RPTFE, or metal seats – all tailored to suit your media, pressure, and temperature requirements.
Low Maintenance, Long Service Life
Our O Type valves are engineered for durability. Fewer moving parts mean lower maintenance and longer intervals between replacements.
O-Type Ball Valves Typical Applications
Oil & Gas Pipelines
Chemical Processing
Water Treatment Plants
Power Generation Systems
Steam & Thermal Fluid Networks
HVAC and Industrial Utilities
O-Type Ball Valve Overall Dimensions
TOT Valves Can provide you with various sizes of O-type reduced port ball valves. We have listed some manual O-type ball valve sizes suitable for PN16 for your reference.
If you do not have the O-type reduced port ball valve size you need, you can contact us immediately. Our professional sales manager will contact you and can provide you with exclusive ODM and OEM services.
Size
A
B
b1
f
T
Y
L
φd
h
S
K
M
Z
Torque (Nm)
DN
Inch
25
1″
140
115
16
2
74
75
102
16
35
90
28
4-M10
5
40
32
1-1/4″
165
140
18
2
80
81
102
16
35
90
28
4-M10
5
76
40
1-1/2″
165
150
18
2
90
93
110
20
35
90
28
4-M10
6
90
50
2″
203
165
20
2
97
100
110
20
35
90
28
4-M10
6
110
65
2-1/2″
222
185
20
2
109
112
110
20
35
90
28
4-M10
6
160
80
3″
241
200
20
2
128
135
115
25
40
110
40
4-M12
8
180
100
4″
305
220
22
2
145
150
115
25
40
110
40
4-M12
8
220
125
5″
356
250
22
2
193
198
140
30
50
135
40
4-M16
8
330
150
6″
394
285
24
2
210
215
140
30
50
135
40
4-M16
8
550
200
8″
457
340
24
2
251
248
140
40
60
135
40
4-M16
12
890
250
10″
533
405
26
2
302
301
170
50
60
140
64
4-M16
14
1600
300
12″
610
460
28
2
337
338
170
50
60
140
64
4-M16
14
2200
350
14″
686
520
30
2
377
380
210
60
80
170
80
4-M20
18
3300
400
16″
762
580
32
2
447
440
240
70
100
200
80
4-M24
20
3700
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