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A47H-16C cast steel safety valve / wrench spring, micro opening safety valve flange safety valve DN25

price:USD$370.00
discount 70% in 2018-09-20 to 2018-09-22
price: USD$ 259.00
freight :USD$18.00,(Express)
freight :USD$7.00,(Postal parcel)
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Product name:

A47HSpring type safety valve with wrench spring

Product features:

A47HWSpring relief valve with wrench spring is suitable for working temperature≤350On the equipment or piping of steam, air and other media. As overpressure protection device. Standard for connecting flangeJB/T-94Series

 

 

A47HSpring type safety valve with wrench springDetailed information:

 

 

Structure Brief
1
The spring micro opening safety valve has the characteristics of simple structure, good sealing performance, accurate opening pressure, large emission capacity, small back pressure difference and easy adjustment.
2
Nozzle type seat: the seat for a cut of the nozzle seat that reaches the speed of sound at the outlet of the steam flowing through the valve, discharge coefficient, surfacing Stellite seating, erosion abrasion resistance, long service life.
3
Thermoelastic valve: the valve is designed as a thermal elastic structure, using its small deformation under the medium pressure, improve the sealing capacity, overcome the safety valve in the medium pressure near the setting pressure of the front discharge phenomenon. The valve sealing surface adopts advanced laser quenching technology to improve the hardness, wear resistance and impact resistance.
4
Adjusting nut: by adjusting the nut, adjust the amount of spring compression, so that the valve can be very convenient and rapid to obtain accurate setting pressure.
5
Back pressure adjusting sleeve: adjusting auxiliary mechanism of back pressure of valve clack, adjusting back pressure adjusting sleeve can obtain proper back seat pressure difference. Up regulation reduces valve back pressure. When the valve is lowered, the valve back pressure is raised.

 

Installation instructions
1
The safety valve must be installed vertically and preferably installed directly on the joint of the container or pipe. The inner diameter of the joint shall be not less than the inlet diameter of the safety valve.
2
The proper expansion joint must be installed at the exit of the safety valve to prevent the thermal expansion of the exhaust pipe and bring undue thermal stress to the safety valve. The inner diameter of the discharge pipe should be larger than the outlet diameter of the valve, and the length should be as short as possible so as not to turn the corner. The weight of the discharge pipe and expansion joint should not be fixed on the safety valve, but should be fixed on the building. The distance between the centerline of the discharge pipe and the center line of the valve body is as short as possible. The discharge pipe shall be installed separately for each safety valve.
3
The outlet of the muffler should have enough area to prevent the back pressure from affecting the discharge capacity of the valve.

Material of main parts

NO

Part name

Material Science

1

valve body

WCB

2

valve seat

ZG2Cr13

3

Regulating ring

ZG2Cr13

4

Valve

2Cr13

5

Guide sleeve

2Cr13

6

Valve cover

ZG230-450

7

Spring

50CrVA

8

The stem

2Cr13

9

Wrench

ZG200-400

10

Adjusting screw

45

11

Protective cover

ZG200-400

 

Sealing surface material

"H"Surfacing D507, "Y" surfacing Co base cemented carbide

Micro opening safety valve with wrench spring(A47Open type)

A47Micro opening safety valve with wrench spring(Open type)The design of the open bonnet and bonnet can effectively increase the heat dissipation of the spring and improve the service temperature of the valve. The design of the wrench can be used to examine the flexibility of the safety valve regularly, and it is suitable for the medium without pollution to the environment.

technical specifications

Basic design:GB/T 12243
measure       Test:GB/T 12242

Product specification

Product model:A47
Size range:DN25DN250
Pressure grade:1.64.0MPa
Shell material: carbon steel, stainless steel, alloy steel
Applicable medium: liquid
Operation mode: automatic

Design features

The bonnet and bonnet are designed to improve the heat dissipation of the spring
The setting pressure deviation is small and can reach±3%
Opening and closing pressure difference≤15%
High quality spring steel is selected to ensure the service life and stability of spring;
Valves and seats of planar structures are easy to maintain and reprocess;
The setting pressure range is large:0.14.0MPa