1、 Manufacturing StandardsFord Motor Company199512 PRESSURE SWITCHES - HYDRAULIC ES30AND PNEUMATIC TYPESEngineering Standards vacuumswitches may also be of the diaphragm type.2.2.2 Air operated pressure switches for systems operating atpressures in excess of 25 psi shall be of the diaphragm,bellows, B
2、ourdon tube, or other Ford approved principle ofoperation.2.3 | PORT THREADING:2.3.1 | Ports for fluid connections on sensing devices (pressure,| flow, temperature, etc.) shall conform to established| International Standards and be as specified by the end-user| customer.3. ADJUSTMENTS:3.1 The pressu
3、re switch shall incorporate an adjustment for changing thetrip point, and where specified, the differential pressure setting.The adjustments shall be covered to avoid tampering and require atool, such as a screwdriver, for access to, and change of, thesetting.Manufacturing StandardsFord Motor Compan
4、y199512 PRESSURE SWITCHES - HYDRAULIC ES30AND PNEUMATIC TYPESEngineering Standards the drain shall not be connectedto manifolds or other lines which may cause back pressure.5.5 The construction of the bellows, diaphragm or piston assembly shallbe such that it may be easily replaced as a unit assembl
5、y.5.6 The pressure switch enclosure shall have a 1/2 inch (NPT) tappedhole for the electrical conduit or fitting. Conduit opening andpressure port shall be located as shown in Figure 1.5.7 Adequate space shall be provided in the enclosure for connecting theincoming conductors (up to five conductors
6、at least six inches inlength) to the terminals.5.8 A green, hex head, slotted, 8 x 32 minimum screw shall be providedfor grounding the metal enclosure.Manufacturing StandardsFord Motor Company199512 PRESSURE SWITCHES - HYDRAULIC ES30AND PNEUMATIC TYPESEngineering Standards not more than four circuit
7、s, two normally open and two normallyclosed, with no common terminal, shall be contained within thepressure switch enclosure. The normally open and normally closedcontacts shall be identified.6.3 Terminals shall accommodate conductors, AWG 16, 65 strands, throughAWG 14, 19 strands. The conductor str
8、ands shall be clamped betweentwo nonrotating surfaces. The saddle or pressure plate shall becaptive to and ride with the terminal screw.7. NAMEPLATES:7.1 The following data shall be included on the pressure switchnameplate:a) Pressure Rangeb) Pressure range of differential for minimum and maximum op
9、eratingpressure.c) Alternating current and voltage rating of contacts.d) Manufacturers name, model or type number, and other datanecessary to order an exact replacement pressure switch.| NOTE: Denotes area of change in previous issue.|Manufacturing StandardsFord Motor Company199512 PRESSURE SWITCHES - HYDRAULIC ES30AND PNEUMATIC TYPESEngineering Standards & Printed copies are uncontrolled.Systems Engineering (ESSE) Page 4 of 4
