background image

For complete list of sales and manufacturing sites, please visit 

www.emerson.com/actuationtechnologieslocations

 

or contact us at 

info.actuationtechnologies@emerson.com

World Area Configuration Centers (WACC) offer sales support, service, 
inventory and commissioning to our global customers. 
Choose the WACC or sales office nearest you:

NORTH & SOUTH AMERICA

19200 Northwest Freeway
Houston TX 77065
USA
T +1 281 477 4100
F +1 281 477 2809

2500 Park Avenue West 
Mansfield Ohio 44906
USA
T +419 529 4311
F +419 529 3688

Av. Hollingsworth 
325 Iporanga Sorocaba 
SP 18087-105
Brazil
T +55 15 3238 3788
F +55 15 3228 3300

ASIA PACIFIC

No. 9 Gul Road
#01-02 Singapore 629361
T +65 6777 8211
F +65 6268 0028

No. 1 Lai Yuan Road
Wuqing Development Area
Tianjin 301700
P. R. China
T +86 22 8212 3300
F +86 22 8212 3308

MIDDLE EAST & AFRICA

P. O. Box 17033
Dubai
United Arab Emirates
T +971 4 811 8100
F +971 4 886 5465

P. O. Box 10305
Jubail 31961
Saudi Arabia
T +966 3 340 8650
F +966 3 340 8790

24 Angus Crescent
Longmeadow Business Estate East 
P.O. Box 6908 Greenstone 
1616 Modderfontein Extension 5
South Africa
T +27 11 451 3700
F +27 11 451 3800

EUROPE

Berenyi u. 72- 100 
Videoton Industry Park 
Building #230 
Székesfehérvár 8000 
Hungary
T +36 22 53 0950 
F +36 22 54 3700

www.emerson.com/shafer

©2017 Emerson. All rights reserved. 

The Emerson logo is a trademark and service mark of Emerson Electric Co. 
Shafer

TM

 is a mark of one of the Emerson family of companies. 

All other marks are property of their respective owners.

The contents of this publication are presented for information purposes 
only, and while every effort has been made to ensure their accuracy, 
they are not to be construed as warranties or guarantees, express or 
implied, regarding the products or services described herein or their use 
or applicability. All sales are governed by our terms and conditions, which 
are available on request. We reserve the right to modify or improve the 
designs or specifications of our products at any time without notice.

Summary of Contents for Shafer

Page 1: ... and Maintenance Manual PBC 01102001 Rev A January 2001 Shafer Poppet Block Control POWER PILOT EXHAUST OR RETURN OIL Normally closed double three way poppet valve with open exhaust manual and pilot actuated USASI SCHEMATIC ...

Page 2: ......

Page 3: ...f Contents Table of Contents Section 1 Introduction 1 1 Basic Construction 4 1 2 Operation 4 Section 2 Basic Check Out Procedures 2 1 Check No 1 7 2 2 Check No 2 7 Section 3 Bill of Material Section 4 Reconditioning and Assembly 4 1 Reconditioning 9 4 2 Assembly 9 Section 5 Disassembly of the Poppet Block ...

Page 4: ...tion The poppet block control consists of a double three way ported valve body containing two sets of inexpensive easily replaced nylon poppets to provide tight sealing poppet springs push pins power and pilot filters a manual lever assembly and pilot pistons for remote operation NOTE For low pressure applications 350 psi or less the power poppets item 2 in Figure 1 are steel backed Neoprene poppe...

Page 5: ...as is directed through tank port B Figure 2 Pilot Activation FIGURE 2A TANK A POWER PILOT EXHAUST OR RETURN OIL TANK B 5 NOTE Pilot pressure to the opposite pilot piston shown in Figure 2 will activate the opposite set of poppets and direct power gas to tank port A Pilot pistons are equipped with an orifice in order to vent the pilot pressure and allow the control to neutralize after stroking an a...

Page 6: ...R PILOT EXHAUST OR RETURN OIL TANK B 6 7 NOTE Movement of the opposite lever shown in Figure 4 will activate the opposite set of poppets and direct power gas to tank port B Release of the lever will allow the compressed poppet spring and power gas to reseat the power poppet and simultaneously unseat the exhaust poppet Power gas pressure remaining in the gas hydraulic tank is now vented through por...

Page 7: ... leakage throughout the control system In the neutralized position there should be zero power gas leakage from the exhaust port Power gas leakage is usually attributed to debris lodged between the power poppet and seat 2 2 Check No 2 Pull the manual lever to full travel and stroke the actuator partially open or closed NOTE The manual lever for open and close is indicated on the attached tag After ...

Page 8: ... 7 8 7 8 2 Table 1 Item Qty Description Item Qty Description 1 1 Valve Body 15 2 Piston O Ring 2 2 Power Poppet Cap 16 4 Piston Back Up Ring 3 2 Filter Cap 17 4 Piston Wear Ring 4 1 Power Connection Cap 18 8 Cap O Ring 5 1 Exhaust Connection Cap 19 2 Stem O Ring 6 2 Stem Cap 20 1 Check Valve O Ring 7 2 Stem 21 1 Check Valve 8 4 Poppet Nylon 22 2 Power Poppet Spring 8 2 Power Poppet Neoprene Exhaus...

Page 9: ...seat 2 Replace power and exhaust poppets on poppet pins Poppets may be tapped lightly into position with a drift pin and light hammer 3 Check travel of poppet assembly with the scale as shown in Figure 8B Make any adjustment for travel by grinding or filing to shorten the poppet pin or replace with a new pin if length is needed Ref 1 4 drill rod may be substituted for poppet pins in the 1 4 assemb...

Page 10: ...ction 5 Disassembly of the Poppet Block Disassembly and Poppet Block Section 5 Disassembly of the Poppet Block Figure 9 13 21 9 9 8 8 10 17 15 16 16 17 7 17 15 17 7 27 19 6 18 27 19 6 18 23 24 25 23 24 25 28 10 28 20 5 18 13 12 3 18 18 3 13 11 18 4 30 26 18 18 22 22 8 8 1 14 2 2 26 29 ...

Page 11: ...aps 2 remove springs 22 and power poppets 8 See reconditioning and assembly section for reinstallation 2 Exhaust Poppet Removal Disassemble the manual lever assembly by removing bolts 30 and bracket 29 Loosen stem caps 6 remove stem assembly 7 and pilot pistons 10 NOTE Pilot pistons 10 can be removed by threading one of the hex bolts 30 into the back of the piston 10 Remove exhaust poppets and pin...

Page 12: ......

Page 13: ...O Box 10305 Jubail 31961 Saudi Arabia T 966 3 340 8650 F 966 3 340 8790 24 Angus Crescent Longmeadow Business Estate East P O Box 6908 Greenstone 1616 Modderfontein Extension 5 South Africa T 27 11 451 3700 F 27 11 451 3800 EUROPE Berenyi u 72 100 Videoton Industry Park Building 230 Székesfehérvár 8000 Hungary T 36 22 53 0950 F 36 22 54 3700 www emerson com shafer 2017 Emerson All rights reserved ...

Reviews: