Product Description

Suction Unloader Valve

Characteristics

l Complete range of solenoid valves for refrigeration, freezing and air conditioning plant.

l Supplied both normally closed (NC) and normally open (NO) with de-energized coils.

l Wide choices of coils for A.C. and D .C

l Suitable for all fluorinated refrigerants.

l Opening pressure diff.:

Pilot type Direct-acting type

AC:0.05-21bar AC:0-21bar

DC:0.05-17bar DC:0-17bar

l Max working pressure:30bar.

l Temperature of medium :-25℃~105℃.

l FDF is also available with flange connections.

l Versions with UL and CUL approval can be supplied to order.

Operating principle

FDF-B,FDF-Z series solenoid valves are the direct-acting type valves. The pull of the solenoid coil opens the valve port directly by lifting the seat disc off the valve seat .While de-energized in the coil , plug stem will drop and close the valve port because of spring force and its weight.

FDF-M series solenoid valves are pilot type valves. While energized in coil ,the coil emerges magnetic field and picks up plug stem to open the small orifice .With the pressure in the upside of valve reduced, the pressure difference between both side of diaphragm makes the diaphragm lift to open the main orifice. While de-energized in the coil ,plug stem will drop and close the small orifice because of spring force and its weight .The flow medium enters into upside of diaphragm through throttle hole ,then pressure in both side of diaphragm ,balances ,then the diaphragm drops and closes the main orifice.

Connection Size		Connect Form	Opening diff. pressure		Flow Rate Kv(m3/h)	Available medium

In	mm
3/8	10	ODF	Normaly close(NC) (AC):0.05—21 (DC):0.05—17	Normaly open(NO) (AC):0.05—18 (DC):0.05—15	0.8	CFC,HCFC,HFC,Air,Water,≤4°E viscosity machine oil
1/2	12

Medium Temperature(℃)	-25—105
Rated power	AC(V)	24,36,110,220
	DC(V)	12,24, 110,220

Normaly close(NC)		Length	Width	Height
Dimensions (mm)		127	45	88
Normaly open(NO)		Length	Width	Height
Dimensions (mm)		127	45	93
Nominal Liquid Capacity(KW)
	R22	R134a	R404A,R507	R407c
Liquid	18.50	17.00	12.80	19.40
Suction	1.80	1.30	1.60	1.90
Steam	7.40	5.90	6.00	7.70

Installation

l The valve should be installed in horizontal pipe line under vertical position. The flow direction must be in the arrow direction.

l The supply voltage must meet the rated input voltage shown on the label of the coil. Coil taking away from valve when energized in coil is forbidden.

l When brazing the valve with connect tube in system ,follow points are very important.

l Before brazing, coil must be taken away and with wet rags covering the valve body to avoid damage.

l The brazing flame must be avoided facing the valve body.

l It is better to use low temperature type silver to braze.

l For the valve with hand lever ,you must turn the lever firstly ,then make leakage test to protect diaphragm.

Contact Information

STF Shanghai Thermostat Factory Co.,Ltd.

Address: No.655 West Zhongshan Road,

Songjiang District,Shanghai 201600.

Tel: +86-21-60537189
Cell: 86-18516078678

Fax: +86-21-67725882 61303675

Website:

Packaging Detail: carton

Delivery Detail: 15days

Our Services

1)our advantage:

we are the manufacturer with more than 60 years experience in valves. Best price,quality and service, Also we can control the production status.

Shanghai Thermostat team with strong ability in designing and after sell service. Cooperation with Carrier has improved our quality to a new level.

2)Terms of payment: T/T, L/C, Western union.

3)Shipment: average 20-25days after receiving deposit.

4)Delivery: Shanghai ,by sea or air.

5)Gurantee: One year since delivery.

6)Inspection: 100% testing for all the valves.

7) All kinds of CERTIFICATE OF ORIGIN.

Welcome to chooseShanghai Thermostat , we are always ready!