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January 2001

Installation, Operation and Maintenance Manual 

PBC-01102001 Rev. A

8

Section 3: Bill of Material

Bill of Material

Section: 3 Bill of Material

Figure 7

3

18

2

9

28

13

12

14

1

20 21

5

23

24

6

25

7

19

27

11

4

8

15 17

26

30

29

10 16

MAXIMUM WORKING PRESSURE 3000 PSI
MAXIMUM TEST PRESSURE 4500 PSI
POPPET TRAVEL 1/16

1/8 NPTF

PILOT PORT

1/4 NPTF

(OPTIONAL)

POWER

STORAGE TANK

1/2 NPTF

POWER PORT

SECTION A-A

1/2 NPTF
EXHAUST PORT

1/4 NPTF
CYLINDER PORTS

1/8 NPTF PILOT
PISTON PORTS

3/8-16 THD.

8

A

2

A

1 1/2

1 1/16

2 5/8

4

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) 

Exhaust Poppet (Nylon)

23

2

Stem Spring

24

2

"X" Washer

9

2

Poppet Pin

25

2

Stem Boot

10

2

Piston

26

2

Flush Plug

11

1

Strainer (Power)

27

2

Stem Back Up Ring

12

1

Strainer (Pilot)

28

2

Music Wire .018 Dia. x 1" 

Lg. S.S.

13

4

Strainer Seal

29

1

Manual Actuation Plate

14

Flush Plug

30

3

Actuation Plate Mtg. Bolts

*For low pressure applications.

Содержание Shafer

Страница 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 ...

Страница 2: ......

Страница 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 ...

Страница 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...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

Страница 12: ......

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