Wennstrom

Updated:
2012-05-03

Valves

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PRODUCTS
	Check valves	Read more>
	HSE Interlock valves	Read more>
	Pressure/vacuum vent valves	Read more>

Check valves

The Wennstrom check valves are mechanical devices that only allow liquid fuels to pass through in one direction. There are two basic types, straight or angled, in an adjustable or a non-adjustable version of varying dimensions. The check valves are adjustable between 0,3 – 0,7bar.

Our 1½ check valve allows a flow rate of 390l/min at 0,3bar suction and the 2” check valve allows 540l/min.

For use at airports there is a chemically nickel-plated adjustable version available as 1½” or 2”.

Versions of check valves		Item no.
	Check valve 90° G1½”	220-01
	Check valve 90° G2”	220-02
	Check valve 90° G1½” adjustable	220-3
	Check valve 90° G1½” adjustable for aviation	220-3E
	Check valve 90° G1½” adjustable spring kit	220-4
	Check valve 90° G2” adjustable	220-5
	Check valve 90° G2” adjustable for aviation	220-5E
	Check valve straight G1½”	235-01
	Check valve straight G1½” adjustable	235-3
	Check valve straight G2” adjustable	235-5

HSE Interlock valves

Safe discharge
When a delivery hose is connected to the filling point at a service station there could be a potential difference between the couplings which can cause an ignition. At that moment there is a risk of an explosive environment around the open filling coupling of the ground tank. A source of ignition and a potentially explosive environment are the two basic risks handled by the ATEX-directive.

Only open when connected
The main function HSE Interlock valve is to keep the filling point (and the ground tank) closed whenever the delivery hose is connected or disconnected. This is done via mechanical interlock feature which contains the explosive environment within the ground tank.

Many versions
The connection flanges are easy to change and adapt to the requirements of the local market, as is the interlock lever that differs depending on the flanges. The
HSE Interlock valve is available in 3” and 4” versions.

H = Health
When opening the filling coupling, any overpressure, no matter how small, will force the fuel fumes from within the ground tank out into the face of the driver delivering product. This is avoided by using the Interlock valve resulting in a much improved working environment for the driver.

S = Safety
As explained earlier, the risk for an explosion from a spark caused mechanically or due to potential differences between the hose coupling and the filling coupling, are eliminated by the Interlock valve.

E - Environment
The VOC directive (94/63/EC) from 1994 on the control of volatile organic compounds (VOC) emissions resulting from the storage of petrol and its distribution from terminals to service stations clearly supports the environmental feature of an Interlock valve in preventing emissions from an open filling point.

Versions of HSE Interlock valves		Item no.	Intended for
	HSE Interlock valves 3” G3/Kamlok 3”	ES1080CJ	E85
	HSE Interlock valves 3” G3/VK-TW80	ES1080CN	E85
	HSE Interlock valves 4” G4/Kamlok 3”	ES1090EJ	E85
	HSE Interlock valves 4” G4/FW135	ES1090EH95	Petrol 95
	HSE Interlock valves 4” G4/FW135	ES1090EH98	Petrol 98
	HSE Interlock valves 4” G4/VK-TW100	ES1090EP	E85
	HSE Interlock valves 4” G4/VK-TW100	ES1090EP95	Petrol 95
	HSE Interlock valves 4” G4/VK-TW100	ES1090EP98	Petrol 98
	HSE Interlock valves 4” G4/VK-TW100	ES1090EPD	Diesel
	HSE Interlock valves 4” G4/FW125	ES1090EGD	Diesel

Accessories to the		Item no.
	Cover Kamlok 3“ till ES1080CJ/ES1090EJ	ES1080J
	Cover VK-TW80 till ES1080CN	MB80AL
	Cover FW135 till ES1090EH	135-102
	Cover VK-TW100 till ES1090EP	MB100AL

Pressure/vacuum vent valves

Containment
Under normal operating conditions, tanks containing petroleum products should be sealed to the atmosphere. This not only minimizes the spreading of VOC vapours, it also prevents unnecessary ventilation which may lead to damp air condensating into water in the tank.

Protect the storage tank
A pressure/vacuum (p/v) vent valve will protect the storage tank from damage due to pressure by balancing pressure tops and drops.

Proven P/V vent valve
The Wennstrom p/v vent valve is a based on a patented gravity solution that enables a wide range of pressure and vacuum values, depending on the field of use and the local requirements. The End-of-Line version is constructed to fulfil the leak rate requirements of California standards.

Cost efficient
The design of the unit and the choice of material is based on the flow rate and pressure/vacuum requirements of service station storage tanks. The ease of installation and no requirements of periodical maintenance requirements make the p/v vent valve the perfect choice.

Total risk analysis
In combination with ES118 – VR1 adaptor with flame arrester, the HSE Interlock valve at the filling point and a flame arrester if required, the storage tank will be effectively safeguarded against probable risks for explosion.

Versions of pressure/vaccum vent valves		Item no.
	End-of-Line pressure/vaccum vent valve (+20/-4mbar)	ES4061A
	In-Line pressure/vaccum vent valve (+20/2.5mbar)	ES8061AA