EN 764 Breather Valve Caps Steel Sheet Metal, with Double Valve

Photo

EN 764 Steel Sheet Metal Breather Valve Caps, with Double Valve Bildvariante: G - Thread
ELESA original design
code: SMN./SMW.
Bildvariante: G - Thread
EN 764 Steel Sheet Metal Breather Valve Caps, with Double Valve Bildvariante: G - Thread EN 764 Steel Sheet Metal Breather Valve Caps, with Double Valve Bildvariante: BA EN 764 Steel Sheet Metal Breather Valve Caps, with Double Valve Bildvariante: NPT

Product description

Information

For function and operational criteria of breather valve caps EN 764 with double valve (type FD), see description of function.

For the version with bayonet mount and filler strainer, the six M5x10 slotted head screws are included.

Specification

Body
Steel sheet metal

  • Cap
    Chrome plated
  • Other steel parts
    Zinc plated

Seal
Rubber NBR (Perbunan®)


Air filter
PU foam (Polyurethane)

  • Grade of filtration 40 µm
  • Temperature resistant up to 212 °F (100 °C)

Thrust spring
Stainless steel


RoHS

On request

Type FD with other opening pressure
Threaded version with dipstick

Technical drawing

3D
Hide technical drawing
EN 764 Steel Sheet Metal Breather Valve Caps, with Double Valve sketch

Part Options / Table

Type

FWith filter
FDWith filter and double valve (only for d1 = 81 mm)
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Metric

Dimensions in: Inch (change to Metric)
d1d2
Pipe thread

Bayonet mount
d3d4d5d6l1l2l3l4l5 ≈l6A/FOpening pressure
in mbar
Type FD
1.85G 1/41/4 NPTBA0.282.051.571.060.390.202.011.380.512.600.67-
3.19G 3/43/4 NPTBA0.673.272.831.930.630.472.761.650.673.151.18350

Build & Price

3D Product Configurator
Diameter d1
Pipe thread d2
Pipe thread d2
Bayonet mount d2
Type


Description of Function

764

EN 764 filler breathers with double valve are normally used when the fluid container is under pressure, yet air has to flow in from the outside in case of underpressure (decreasing fluid level).

This is achieved by combining two valves (check / bypass valve). The inlet valve allows air to enter at an underpressure of 30 mbar or higher. The second valve only opens at an overpressure of > 350 mbar.

The air filter prevents contamination of the fluid from outside (dust). It is made of PU foam with a grade of filtration of 40 µm.

The overpressure inside the container ensures that the air volume, which is flowing in or escaping due to the fluctuating fluid level, is kept to a minimum. This reduces filter fouling and substantially increases the service life, especially in dusty environments.

In addition, a pressurized container has a positive effect on the function of the pump and prevents the formation of foam. The valve seal ensures that no fluid will leak, especially if the fluid is strongly moved or during transport.

Sketch GN 764 air flow rate

Air flow rate [l/min] as a function of the pressure difference Δp [mbar] container / outside space (type F with filter).

Sketch GN 764 pressure curve

Pressure gradient Δp [mbar] in the container as a function of the air flow rate [l/min] at a valve opening pressure of 350 mbar (type FD with filter and double valve).

Selected Part

Total US Dollars (net)
$22.52
Call / Email for Delivery Time
Please note our quantity discounts (US Dollars).
MinMaxPrice
16$22.52
799$21.70
100249$20.47
≥ 250$18.42
Prop 65: -
Please contact our Sales Department for more information.
RoHS: -
No details on RoHS compatibility are available at this time. Please contact our Sales Department for more information.
Weight: 0.440 lbs
If weight is not listed, please contact our Sales Department for additional information regarding weight.
Phone: 800-877-8351
All Prices are in US Dollars. Taxes Not Included.

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Our service team is available from Monday to Friday between 7:30 AM and 5:00 PM Central Time: 800-877-8351

Special Requests | Contact our sales team

EN 764-47-G1/4-FEN 764-47-1/4NPT-FEN 764-47-BA-FEN 764-81-3/4NPT-FEN 764-81-3/4NPT-FDEN 764-81-G3/4-FEN 764-81-G3/4-FDEN 764-81-BA-FEN 764-81-BA-FD

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