802DS Pressure and Temperature reducing valve

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US $10-1,000 / Sets | 1 Set/Sets more (Min. Order)
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Overview
Quick Details
Type:
Valves
Place of Origin:
Jiangsu, China (Mainland)
Model Number:
802DS
Brand Name:
ZOOLV
Characteristics:
Linear, Equal%
Density:
Single nozzle
Structure:
single seated
Body connections:
Flanged(RF,RTJ,MFM), Weld ends(SW : 2" and under, BW : 3" and over)
Action Type:
Direct and Reverse Type
Installation:
vertical-up or horizontal pipe
Stroke:
20~100mm
Function:
Reduce pressure and temperature
Rangeability:
50 : 1, 30:1, 25:1
Leakage:
CLASS V
SupplyAbility
SupplyAbility:
1000 Set/Sets per Month more
Packaging & Delivery
Packaging Details
packing according to customers' requirements
Port
Shanghai
Lead Time :
30-60days

 

Product Description

Standard Specification:

Steam

Pipe Line

4"~20"

Connection

3", 4"

CL150, CL300,CL600, CL900, CL1500 and CL2500

Cooling water

Connection

3/4",1", 1-1/2", and2"

CL150, CL300,CL600, CL900, CL1500 and CL2500

Pressure Required

3.5 to 35 bar (50 to 500 psig) greater than steam line pressure

Body connections

Flanged(RF,RTJ,MFM), Weld ends(SW : 2" and under, BW : 3" and over)*1

Characteristics

Linear, Equal percentage

Rangeability

50 : 1, 30:1, 25:1

Seat Leakage

ANSI CLASS V

Minimum Steam Velocity

9.1 meters per second (30 feet per second)*2

 1. Do not exceed the pressure or temperature limits in this instruction manual, nor any applicable code or standard limitations.

 

2. Minimum steam velocity is a function of several application parameters and may be adjusted upward or downward from this standard.If upstream velocity is lower than 9.1meters per second, a liner will be added in the header of steam in order to improve the system, i.e. to increase the steam velocity at the point of water injection.


 

Structure:

Main steam system piping (Figures 1 and 3)

1. Minimum straight pipe downstream: The desuperheater requires a minimum of15 feet [4.6 meters] of straight pipe from the valve installation to the first bend downstream.

2. Minimum straight pipe upstream: The desuperheater requires a minimum of6 diameters of straight pipe upstream [Min 2 meters].

3. Pipe bends should be long radius type to aid in keeping the steam/water vapor mixture in suspension until evaporation is complete.

4. Avoid using branch lines between the desuperheater and the downstream temperature sensor.

5. Minimum distance to the downstream temperature sensor is 40 feet [12 meters].

6. The temperature sensor should be mounted in accordance with manufacturer’s recommendation. The sensor should not be mounted in an elbow or pipe bend.

7. Desuperheater applications requiring multiple desuperheaters in the same steam line should split range the instrument signal with the downstream desuperheater opening first.

 

Steam pipe mounting orientation (Figure 1)

1. The desuperheater must be mounted at 90 degrees to the steam line for all orientations of steam flow.

2. The vertical-up (12 o’clock) position of the actuator is preferred in a horizontal steam line. If the desuperheater is installed in other than the vertical up position then the actuator should be supported.

3. The desuperheater must be installed such that the spray nozzles are facing downstream, i.e. the water spray direction must be in the same direction as the steam flow.

 

Cooling water supply and connection (Figure 1)

1. The cooling water should be clean, filtered condensate or boiler feed water.

2. We recommends that the cooling water line include a shut-off valve and a strainer with .010” [0.25mm] perforation, or equal mesh, sized for the flow rate requirements.

3. The water pressure at the inlet to the desuperheater should be per the ZOOL certified sizing sheet.

4. The water flange connection has a specific orientation to the direction of water spray(see Fig.1). The water spray direction must be in the same direction as the steam flow.

 

Typical control loop

A typical control loop is illustrated in figure 1. A temperature sensor (TE) measures changes in temperature and transmits a signal to a remote temperature-indicating controller or distributed control system (DCS). The output signal from the controller is sent to the positioner on the desuperheater. The positioner output signal is pipedto the actuator, which strokes the stem/plug of the desuperheater. A rising stem opens the desuperheater to allow additional water flow.

  

 

 

 

 


   

 

 

Packaging & Shipping

 

Packaging: Plywooden case

Shipping: The seller ensures packing suitable for shipment by sea to protect the goods from damages. 

 

 

Company Information

We’re Wuxi ZooL Control Valves Co.,LTD ,and specialized in producing and selling high performance industrial process control valves,ball valves,butterfly valves and so on,

 

 

Our Services

Warranty :   The seller will give one  years warranty for product since on boar date and gives the buyer full technical supports on instalaltion, operation and maintenance.   

Delivery:      Within 2 months since the seller receives deposit.(Special valve need long delivery time) 
 
Shipping Documents after the seller receives the balance.

1. Telex release

2. Scan of B/L

3. Colour scan of commercial invoice and packing list 

 

If you have interest,pls free feel to offer us detail data sheet,such as body size,body material,medium,temperature,flow rate,etc.

 

                                                                                       

                                                                                                 Contact:Hope Jiang 

  SKYPE:hope_jiang88 

            Phone:0086-13771158652