Product Overview

The AE14 is a range of float type air vents for liquid systems. The body and cover are manufactured in SG iron and the unit is readily maintainable. The standard version with a Viton valve head is designated AE14. This model is also available with an inbuilt stop valve fitted to the inlet port, designated AE14SV and AE14ESV, which allows for maintenance and cleaning without having to drain the system.

Available Types

• AE14: Fitted with a Viton valve head (standard version)
• AE14E: Fitted with an EPDM valve head
• AE14S: Fitted with a stainless steel valve head (for higher temperatures)
• AE14SV: Fitted with a Viton valve head and stop valve
• AE14ESV: Fitted with an EPDM valve head and stop valve

Pressure / Temperature Limits

Parameter	Value
Body design conditions	PN16
Maximum allowable pressure (PMA)	16 bar g @ 110 °C
Maximum allowable temperature (TMA)	250 °C @ 13.6 bar g
Minimum allowable temperature	0 °C
Maximum operating pressure (PMO)	16 bar g
Maximum differential pressure (ΔPMX)	14 bar g
Designed for a maximum cold hydraulic test pressure of	24 bar g
Minimum specific gravity of liquid	0.6

Maximum operating temperature (TMO) for different models:

• AE14E and AE14ESV: 127 °C @ 15.5 bar g
• AE14 and AE14SV: 200 °C @ 14.5 bar g
• AE14S: 250 °C @ 13.6 bar g

Material Specifications

No.	Part	Material	Standard
1	Body	SG iron	EN-GJS-400-15
2	Cover bolt	Steel	BS 3692 Gr. 8.8
3	Cover gasket	Reinforced exfoliated graphite	-
4	Cover	SG iron	EN-GJS-400-15
5	Main valve seat	Stainless steel	BS 970 431 S29
6	Main valve seat gasket	Stainless steel	BS 1449 304 S11
7	Main valve assembly screws	Stainless steel	BS 6105 Cl A2-70
8	Ball float and lever	Stainless steel	BS 1449 304 S16
9	Valve head (AE14/SV)	Viton	-
	Valve head (AE14E/ESV)	EPDM	WRc 9205519
	Valve head (AE14S)	Stainless steel	AISI 440B
10	Pivot frame	Stainless steel	BS 1449 304 S16
11	Pivot pin	Stainless steel	-
12*	Stop valve housing	Brass	BS 2874 CZ 121 3Pb
13*	Stop valve spindle	Brass	BS 2874 CZ 121 3Pb
14*	Stop valve head	Brass	BS 2874 CZ 121 3Pb
15*	'O' rings	Synthetic rubber	Flurocarbon
16*	Stop valve gasket	Copper	BS 2870 C 101

* Note: Parts 12 to 16 are used for AE14ESV and AE14SV only.

Dimensions and Weights (Approximate mm and kg)

AE14, AE14E, AE14S (Standard)

Size	A	B	C	D	E	F	G	Weight
½"	147	114	80	114	105	60	60	2.5
¾"	147	114	80	114	105	60	60	2.5

AE14ESV, AE14SV (with Stop Valve)

Size	A	B	C	D	E	F	G	H	Weight
½"	148	114	65	129	105	76	60	147	2.7
¾"	148	114	65	129	105	76	60	147	2.7

Capacities

Spare Parts

The spare parts available are shown in solid outline. Parts drawn in a grey line are not supplied as spares.

Available Spares:

• Maintenance kit: 3, 5, 6, 7 (2 off), 8, 9, 10, 11, 14, 15 (2 off), 16
  • Note: Item 9 is attached to item 8 when supplied for the AE14S.
• Seal kit: 3, 6, 14, 15 (2 sets), 16
• Valve head (packet of 3): 9
  • Note: 1 off EPDM and Viton valve head is supplied to fit as required.

Recommended Tightening Torques

Item	Part	or mm	Thread Size	Torque (N m)
2*	Cover bolts	17 AF	M10 x 30	47 - 50
5	Main valve seat	17 AF	-	50 - 55
7	Main valve assembly screws	Pozidrive	M4 x 6	2.5 - 3.0
12*	Stop valve housing	21 AF	-	30 - 35

* Note: Items 2 and 12 are not supplied as spares.

Safety Information, Installation and Maintenance

For full details see the Installation and Maintenance Instructions (IM-P149-06) supplied with the product.

Disposal: This product is recyclable. No ecological hazard is anticipated with the disposal of this product providing due care is taken.

How to Order

Example: 1 off Spirax Sarco ½" screwed BSP AE14 automatic air vent with SG iron body and Viton valve head.