Crane DEPA Nopped E4 Series User manual

www.cranecpe.com

ASSEMBLY INSTRUCTIONS

DEPA® Closed Surface Diaphragms

Series Nopped E4®

brands you trust.

www.cranecpe.com

Replacing the diaphragms

In addition to the following assembly steps, please also

refer to the information contained within the DEPA®

Installation, Operation and Maintenance Manual (IOM).

1. Disassembling the old diaphragms

Disassemble suction- and discharge manifolds.

Pic. 1: Disassembling of the manifolds

Disassemble pump chambers. For DH pump series

untighten the screws and bolts, for the DL pump series

release the clamp bands.

Pic. 2: DH pump series

Pic. 3: DL pump series

Afterdisassemblingofthepump chambers,thediaphragms

can be disassembled. First pump side: Disassemble the

outer piston (diaphragm with piston ﬁxture).The piston rod

features a wrench attachment point. Hold it in place with

a wrench (pic. 4 and 5). Remove the assembly consisting

of outer piston, diaphragm and inner piston (piston rod

is exposed). On the opposite side take out the assembly

consisting of the diaphragm, inner piston, outer piston

and piston rod, from the center block (w/o picture). Detach

piston rod from the second diaphragm by clamping in an

exposed side of the piston rod in a bench vise. Disassemble

the outer piston and remove from piston rod. Diaphragm

and inner piston can be disassembled.

Pic. 4: Diaphragm disassembly Pic. 5: Hold it in place with wrench

Pic. 6: Diaphragm with piston ﬁxture

2. Assembling the nopped E4® diaphragms

Screw threaded pin with hex wrench into the nopped E4®

diaphragm.

Pic. 7

Outer piston Inner pistonDiaphragm

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Replacing the diaphragms

Place switch disc on top. The radius or the chamfer is

mounted in the direction of the diaphragm´s air side.

(Pic. 8)

Pic. 8

Screw piston rod onto set screw and tighten by hand

(nopped E4® assembly unit including the piston rod, see

Pic. 9)

Pic. 9

Pic. 10

Before assembling the diaphragm unit, check whether

other parts of the center block need to be exchanged

(e.g. defective or dirty seals, piston rod bearings, defect

air valve, pilot rod or silencer). If required, exchange these

accordingly.

Slide in the nopped E4® assembly unit into the center block

(picture 11) and ﬁx the second diaphragm with switch disc

on the opposite side (mount the threaded pin in the second

nopped E4® diaphragm as shown in picture 7). Tighten the

second diaphragm by hand (picture 12). At the same time,

lock the piston rod with a wrench.

Install pump chambers, insert valve seats and balls (check

for any damages and if required replace), mount suction

and discharge manifolds as per the DEPA® IOM.

Pic. 11 Pic. 12: Tighten by hand

The DEPA® nopped E4® starter kit contains

• 2 diaphragms

• 2 switch discs

• 2 set screws

• Sealings for air control area of pump

Note: The DEPA® nopped E4® starter kit includes switch discs

and set screws in the matching sizes. Switch disc material for

sizes 15, 50 and 80 is POM, for the sizes 25 and 40 aluminium.

Each switch disc has a diﬀerent thickness. The set screws are

available in three sizes (15, 25 & 40 and 50 & 80)

Pic. 13: Switch discs and set screws

Note: For DEPA® pumps with nopped E4® diaphragms a new

pump coding system is used. To recognize a retroﬁtted DEPA®

pump, please use the sticker enclosed in this manual and

attach it, next to the nameplate area. Upon request we can

supply you with a new nameplate.

Chamfer radius

Aluminium switch disc POM switch disc

15 25 40 50 80

Crane ChemPharma & Energy

Crane Process Flow Technologies GmbH

Heerdter Lohweg 63-71

40549 Düsseldorf, Germany

Phone: +49 211 5956-0

E-mail: [email protected]om

www.cranecpe.com

www.depapumps.com

Crane Co., and its subsidiaries cannot accept responsibility for possible errors in catalogues, brochures, other printed materials, and website

information. Crane Co. reserves the right to alter its products without prior notice, including products already on order provided that such

alteration can be made without changes being necessary to speciﬁcations already agreed. All trademarks in this material are property of

the Crane Co. or its subsidiaries. The Crane and Crane brands logotypes (in alphabetical order), (ALOYCO®, CENTER LINE®, COMPAC-NOZ®,

CRANE®, DEPA® DUO-CHEK®, ELRO®, FLOWSEAL®, JENKINS®, KROMBACH®, NOZ-CHEK®, PACIFICVALVES®, RESISTOFLEX®, REVO®, SAUNDERS®,

brands you trust.

CCPE-DEPA-CSD-IM-EN-A4-2019_02_01

Connect with DEPA®

linkedin.com/company/crane-depa

@depa_pumps

[email protected]

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