Location:PRODUCTS >> Oil field valve >> Medium pressure flat gate valve
Medium pressure flat gate valve
Model: Z43H
Nominal diameter: DN50 ~ 500mm
Nominal: PN0.4 ~ 2.5MPa
Suitable medium: water
Operation: manual
Connection: Flange
Body Material: steel
Seal forms: hard seal type

 Flat gate valve for natural gas, petroleum, chemical, environmental protection, urban pipelines, gas pipelines and other pipeline, venting system and steam storage device, used as hoist equipment. Z43 single gate with diversion gate plate valve for natural gas extraction and purification of long-distance pipeline. 


 Flat gate valve features:

 1. Sealing structure of the valve seat should be elastic pre-tightening, upstream and downstream sealing seat seal structure at the same time. Seat and seal are always face-to-face seals. 
 2. Seat has a self-cleaning function, and the valve is opened or closed during the direct flow of air erosion. Seat should be made of lubricated, non-abrasive material. 
 3. Valve actuator failure does not affect the rest of the valve, maintenance and replacement work can be carried out without removing the valve. 
 (1) Yoke Sleeve - The aluminum bronze yoke sleeve is equipped with a needle thrust bearing to minimize operating torque. 
 (2) Stem - thread length up to bracket; pin and spot welding; stable. 
 (3) Pressure Sealed - Simple to assemble, with sectional buckle and silver-plated mild steel washers to help disassemble and achieve the best bonnet seal. 
 (4) Seat Ring - Welded seat ring is perpendicular to the flow path for easy maintenance. 
 (5) Actuators - These valves can be equipped with electric, hydraulic or pneumatic actuators. DN300 following the standard configuration handwheel, DN350 above configuration helical gear operating mechanism. 
 (6) Yoke - The fully assembled yoke passes the seismic test for easy maintenance and installation of the actuator. 
 (7) Gland - Two-piece, self-adjusting gland to avoid being ejected. 
 (8) overall rear seat - hard surface, the longest service life. 
 (9) Flap - The spring-loaded flap regulates itself to reduce actuator torque demand. 
 (10) The overall stop - the overall casting bracket stopper device, positioning the assembly of the bracket valve, making the valve seat more stable and reliable. 

 

Executive Standard:

Design specifications

Structure length

Connect the flange

Test and inspection

Pressure - Temperature

Product Identification

JB / T5298

JB / T5298

JB / 79

JB / T5298

GB9131

GB / T12220

API6D

API6D

ANSI-16.5

API6D

ANSI B16.34

MSS SP-25


Product Performance Specifications:

Design level

Test pressure at room temperature (MPa)

Applicable temperature ℃

Suitable media

case

Left seal

Left seal

Low pressure seal

"G" type

"D" type

normal type

"Anti-sulfur" type

"Basic" type

PN (MPa)

1.6

2.4

1.76

1.76

0.6

-29 ~ 50

-45 ~ 21

-2 to 121

H2S and CO2
total content
of more than
500mg / m2 media

Oil and gas,
water and so on

2.5

3.75

2.75

2.75

0.6

4.0

6.0

4.4

4.4

0.6

6.4

9.6

7.04

7.04

0.6

Lb

150

3.0

2.2

2.2

0.6

300

7.7

5.6

5.6

0.6


 The main parts and materials:

Valve / bonnet

WCB

WC6

A352-LCB

A351-CF8M

gate

2Cr13 + ENP

20CrMoV + STL

ANSO410 + ENP

ANSI316 + ENP

Valve stem

2Cr13

2Cr13

A182-A6a

A182-A316S

Seat

25 + PTFE

20CrMoV + STL

A105 + PTFE

A182-F316 + PTFE

filler

NBR / FPM

Flexible Graphite

Teflon / PTFE + FPM


Gasket

-

bolt

35

35CrMo

A193-B7M

A193-B8

Suitable media

Water, oil port, steam

Steam, oil

Propane, ethylene

Nitric acids


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