Answer / oscar b. ano-os jr.

In general, valves can be categorized only into two types,
STOP VALVES AND CHECK VALVES... Stop valves are used to
control process flow (i.e 25%, 50%, 75% and so on) while
check valves are used to restrict the flow of process in
only one direction.

Types of Stop Valves are Globe Valves, Butterfly Valves,
Ball Valves, Saunders Valve and other types while the most
coomon tyoe of Check Valve is the Relief Valve used to
deppresurize tanks and vessels...

Answer / www.islamqa.com

We can devide valve types by 3 considerations:

# valve types with considering valve function- so we have:
on/off valve
control valve( or called throttling or modulating valve )
safety/relief valve
check valve

# valve types with considering stem motion- so we have:
linear motion which have: globe, gate, bench valve
rotary motion which have: ball, butterfly, disk valve

# valve types with considering actuator type- so we have:
manual valve
MOV (Motorized Operating Valve)
solenoid valve
pneumatic valve: diaphragm, piston valve
hydrolic valve: piston valve

Regards,

Ahmed Sabry
Control and Instrumentation Engineer
GPC - General Petroleum Company
CELL.: 00 2 0121367310

How many interlocks at turbine? Plz explain briefly

0 Answers   MRPL Mangalore Refinery and Petrochemicals Limited,

---

what is insdustrial vibration.who it works. give atleast 2 types of insdustrial vibration

0 Answers  

---

Could anybody tell how much amps will a single input to plc will consume?

1 Answers  

---

HOW TO DO PERFECT CALIBRATION OF DIFFERENTIAL PRESSURE TRANSMITTER FOR CLOSE VESSEL TANK LEVEL PURPOSE ???? AND HOW TO MAKE ZERO PRESSURE ?? Rosemount 2051 Pressure Transmitter with HART® Revision 5 and 7 Selectable Protocol BIENG USED !! HOW TO CALIBRATE FIELD SIDE DPT WITH THE HELP OF SPAN & ZERO PUSH BUTTONS ??

1 Answers   Bhel,

---

i want interview questions about PROCESS CONTROL INSTRUMENTATION , SENSORS AND TRANSDUCERS IF ANY BADY KNOW ABOUT THAT PLEASE SEND TO MY MAIL karumudi1003@gmail.com

8 Answers   Honeywell, Reliance,

---

---

How to calculate the flow rate in Vortex flow meter?What is K factor?Can you give me an example calculation to understand the same as better?

1 Answers   npcc, Zadco,

---

How to calibrate level transmitter with use of HART?

0 Answers   Samsung,

---

What is surge and how is it prevented, what is the purpose of bypass valve across AS valve.

0 Answers   ADMA OPCO,

---

i want the equation of this question. Tranmitter range is 120 mmwc and dcs flow range is 1700 nm3/hr. if i want to change dcs range from 1700 to 2400 nm3/hr then how much dp i have to enter in transmitter

2 Answers   GMR,

---

Draw a complete P&ID of a flow suction tank indicating all control & protection equipment. Indicate all its inlets and outlets. Explain the controls for this system

0 Answers  

---

Introduce yourself which is not present in your biodata?

0 Answers   GAIL,

---

plz send me placement paper of ongc

0 Answers   ONGC,

---