Menu

Connect with us

Shanghai Jindun genuine fire valve Jav shield breathing valve (JAV)

JAV type insulation jacket breathing valve installed in the tank top has heat preservation function and solve the tank pressure, negative pressure of the gas, the liquid out of the tank is not impeded, when the liquid in the tank when the gas out of a large number of outbound (known as pressure). If the liquid in the tank goes out, the tank must be sucked into the tank from the outside air (called negative pressure). If the valve is closed automatically when the work is stopped, the liquid gas in the tank can not be leaked out, and the quality of the liquid in the tank can be ensured.

price:USD$5.00
discount 70% in 2018-09-25 to 2018-09-27
price: USD$ 3.50
freight :USD$18.00,(Express)
freight :USD$7.00,(Postal parcel)
Minimum Order Quantity:3
views:0
Search Similar or mail to saler or send message to saler

Pay with PayPal, PayPal Credit or any major credit card

Basic information bar

Product NameModelSpecificationspressureTexture of material
Jacketed breather valveJAVDN50-250mmPN1.0mpaCast steel; stainless steel

 

I. brief introduction

Arimori夹套保温呼吸阀结构图JAV type insulation jacket breathing valve installed in the tank top has heat preservation function and solve the tank pressure, negative pressure of the gas, the liquid out of the tank is not impeded, when the liquid in the tank when the gas out of a large number of outbound (known as pressure). If the liquid in the tank goes out, the tank must be sucked into the tank from the outside air (called negative pressure). If the valve is closed automatically when the work is stopped, the liquid gas in the tank can not be leaked out, and the quality of the liquid in the tank can be ensured.

 

Two. Working principle

The jacketed breather valve makes full use of the pressure capacity of the tank itself to reduce the discharge of the medium. The principle is to control the positive pressure of the tank and the suction negative pressure by using the weight of the positive and negative pressure valve plate. When the tank medium pressure within the control range of operating pressure breathing valve, Jav does not work, keep the tightness of the tank; when added to the tank medium, the upper space gas tank pressure increases, breathing valve operation to achieve positive pressure when the pressure valve is opened, the escape the gas exhaled from the breathing valve, the pressure in the tank is not to continue to increase; when the tank pumped medium, the upper space gas tank pressure drops, breathing valve operation at negative pressure, the outside of the tank atmosphere will open the top of the negative pressure valve disc Jav open top, the external gas entering the tank, the tank pressure will not continue to fall, let the pressure balance inside the tank and the outside of the tank, to protect the safety device of tank.

 

Three, connection size

SpecificationsweightMounting dimensions (mm)
d1d1lhn×φ
dn506.5φ110φ1401602554×14
dn809.8φ150φ1852132604×18
dn10012φ170φ2052652904×18
dn15021φ225φ2603053308×18
dn20031φ280φ3153553508×18
dn25035φ335φ37042040012×18

 

Four, inspection work

1. regularly check the positive and negative pressure valve plate movement is flexible.
2. check whether the shell of the valve shell is broken, whether the gland gasket is tight, and whether there is freezing in winter;
3. carefully check the contact surface of the guide rod and the valve plate, whether or not damaged.
4., in the inspection and maintenance, should ensure that the valve in the joint surface close coordination, the valve plate lifting flexible.
5. keep the jacket insulation air valve mesh clean and smooth. 6. when the valve fails, it may affect its normal work, should immediately report to the monitor or professional leadership.