Fisher 75A Pressure Reducing Regulator Transition Guide, Fisher-EN Manuals & Guides

Transition Management Guide

Type 75A

July 2007

INLET PRESSURE
OUTLET PRESSURE

E-55 Series

Type PBE-2

D104603X012

April 2021

Fisher Type 75A to Cash Valve Type E55

Fisher Type 75A to Cash Valve Type E55
Regulators Transition Management Guide

Fisher Type 75A

Figure 1. Fisher Type 75A and Cash Valve Type E55 Pressure Regulators

Background

The Fisher Type 75A is a direct-operated pressure
reducing regulator used in domestic or industrial water
applications. It is self-contained and does not require
an external control line to operate, i.e. it has internal
pressure registration. Fisher Type 75A overlaps heavily
with the Cash Valve Type E55 pressure reducing
regulator in both offering and application. The Cash
Valve Type E55 features higher inlet pressure, higher
temperature and more control range capabilities.
These advantages along with others make the Cash
Valve Type E55 an ideal candidate to help sunset the
Fisher Type 75A.

Cash Valve Type E55

Transition Management

In order to ensure a complete coverage of design

aspects, including mapping specic Fisher product
numbers to the equivalent Cash Valve nished good

numbers, the following categories are useful:

1. Fit – Is the installation of this product di󰀨erent?

2. Form – Are there any physical changes?

3. Function – How is the product di󰀨erent in its

operation and performance?

Fisher Type 75A to Cash Valve Type E55

Table 1. Physical Design Comparison

CATEGORY FISHER TYPE 75A CASH VALVE TYPE E55

Sizes

End Connection NPT NPT, BSPT

Face-to-Face Dimensions

Dimensions See Table 4 and Figure 2 See Table 5 and Figure 2

Pressure Registration Internal Internal

1/2, 3/4, 1, 1-1/2, 2 and 2-1/2 in. /

15, 20, 25, 40, 50 and 60 mm

1/2 in. / 15 mm
3/4 in. / 20 mm

1 in. / 25 mm

1-1/2 in. / 40 mm

2 in. / 50 mm

: 3.75 in. / 95 mm
: 4.25 in. / 108 mm
: 4.75 in. / 121 mm
: 5.88 in / 149 mm
: 6.38 in / 162 mm

Table 2. Form Comparison

CATEGORY FISHER TYPE 75A CASH VALVE TYPE E55

Body Material Bronze Bronze

Spring Case Material Cast Iron Bronze

Valve Disc Material Nitrile (NBR) Nitrile (NBR)

Diaphragm Material Nitrile (NBR) Nitrile (NBR) Nylon reinforced

Options - - - -

Table 3. Function Comparison

CATEGORY FISHER TYPE 75A CASH VALVE TYPE E55

Maximum Published Flow 140 GPM of water / 530 L/min of water

Control Pressure Range 25 to 80 psig / 1.4 to 5.5 bar

Maximum Temperature 150°F / 66°C 180°F / 82°C

Maximum Inlet Pressure 200 psig / 13.8 bar 400 psig / 27.6 bar

1. The 7 psig / 0.48 bar o󰀨set pressure and the related capacities are considered the upper limits of ows consistent with good piping practices and maximum uid velocities of
10 feet per second / 3.05 m/s.

2. At 20% droop.

(1)

1/2, 3/4, 1, 1-1/4, 1-1/2 and 2 in. /

15, 20, 25, 32, 40, and 50 mm

1/2 in. / 15 mm
3/4 in. / 20 mm

1 in. / 25 mm

1-1/2 in. / 40 mm

2 in. / 50 mm

Cryogenic construction

140 GPM of water / 530 L/min of water

1/2 to 1 in. / 15 to 25 mm:

15 to 50 psig / 1 to 3.4 bar

25 to 80 psig / 1.7 to 5.5 bar

50 to 110 psig / 3.4 to 7.6 bar

75 to 195 psig / 5.2 to 13.4 bar

100 to 250 psig / 6.9 to 17.2 bar

1-1/4 to 2 in. / 32 to 50 mm:

15 to 25 psig / 1 to 1.7 bar

20 to 50 psig / 1.4 to 3.4 bar

40 to 100 psig / 2.8 to 6.9 bar

75 to 150 psig / 5.2 to 10.3 bar

150 to 300 psig / 10.3 to 20.7 bar

: 4 in / 102 mm
: 4 in / 102 mm
: 4 in / 102 mm
: 5.625 in / 143 mm
: 5.625 in / 143 mm

Strainer Screen

(2)

The following is a discussion covering each of these
three elements.

Fit

Table 1 shows a comparison of body sizes, end
connections, and face-to-face dimensions. For the
most part, the sizes are identical except for two

options; the Type 75A o󰀨ers a 2-1/2 in. / 60 mm size
that the Type E55 does not and the Type E55 o󰀨ers

a 1-1/4 in. / 32 mm size that the Type 75A does not.
The Type E55 is available in both NPT and BSPT

end connections that o󰀨er a larger installation base

and has more platformed face-to-face dimensions.
Although it will not be a direct drop-in replacement for
the Type 75A in terms of face-to-face dimension, the
Type E55 is very similar across the comparable sizes
and only exceed the face-to-face dimension for the

1/2 in. / 15 mm size. For additional prole dimensions

please refer to Figure 2.

2

Form

Table 2 addresses the material and construction
options between the two products. For the most part,

the products are very similar. One notable di󰀨erence

is that the Cash Valve Type E55 is a full Bronze
construction; the spring case in the Fisher Type 75A

is Cast Iron. The Type E55 also o󰀨ers a strainer

screen as an option to help protect the internals from
debris and which is easily cleaned. Furthermore, the

Type E55 o󰀨ers Cryogenic constructions for a broader

application range. Since the products are completely

di󰀨erent, no parts are interchangeable and therefore
a completely new nished product will be required. A

clear distinction between the two products will be the
geometry of the spring case and body connections;
the Fisher is circular whereas the Cash Valve
is hexagonal.

Fisher Type 75A to Cash Valve Type E55

B

B

A

A

B

E

E

D

D

C

C

C

A

CASH VALVE TYPE E55FISHER TYPE 75A

Figure 2. Fisher Type 75A and Cash Valve Type E55 Pressure Regulators Dimensions

Table 4. Fisher Type 75A Dimensions

BODY SIZE A B C D E

In. mm In. mm In. mm In. mm In. mm In. mm

1/2 15 9.75 248 7.12 181 4.31 109 3.75 95 1.88 48

3/4 20 11.25 286 8.38 213 5.44 138 4.25 108 2.12 54

1 25 12.25 311 9.12 232 6.62 168 4.75 121 2.38 60

1-1/2 40 13.62 346 9.88 251 8.19 208 5.88 149 2.94 75

2 50 18.62 473 13.88 353 9.38 238 6.38 162 3.19 81

2-1/2 65 19.12 486 14.12 359 9.38 238 7.75 197 3.88 99

Table 5. Cash Valve Type E55 Dimensions

BODY SIZE A B C SHIPPING WEIGHT

In. mm In. mm In. mm In. mm lbs kg

1/2 15 4 102 7-1/4 184 2-1/4 57 6 2.72

3/4 20 4 102 7-1/4 184 2-1/4 57 6 2.72

1 25 4 102 7-1/4 184 2-1/4 57 6 2.72

1-1/4 32 5-5/8 143 11-1/4 286 3-1/4 83 17 7.71

1-1/2 40 5-5/8 143 11-1/4 286 3-1/4 83 17 7.71

2 50 5-5/8 143 11-1/4 286 2-7/8 73 17 7.71

3

Fisher Type 75A to Cash Valve Type E55

Function

The function of the Type E55 is very similar to that
of the Type 75A since both are direct-operated
regulators. The Type E55 features a balanced piston
design whereas the Type 75A is unbalanced; to the
end user, this means that they do not need to worry

about set point and lockup changes due to uctuating
inlet pressures. The Type E55 also o󰀨ers more control

spring options enabling it to be more accurate across

a wider range of process conditions. It also o󰀨ers a

larger maximum inlet pressure rating meaning that the
application range is larger than that of the Type 75A.

Conclusion

The Cash Valve Type E55 is the best possible

replacement for the Fisher Type 75A and it o󰀨ers a

broader install base due to several available options
such as, more control spring range options, larger
maximum inlet pressure rating, and optional Cryogenic
constructions. The pressure capabilities, along with
a full Bronze construction make this product more
versatile and preferable over the Type 75A. Although
it is not a direct drop-in replacement, the Type E55’s
similarity and ease of maintenance makes it the ideal
choice to supersede the Type 75A. For further details
about each product, please refer to their respective
bulletins and instructions manuals available on the
Emerson website.

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Technologies, Inc. All rights reserved. 04/21.
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