ERHARD ROCO Series, ROCO 5065 Series, ROCO 5064 Series, ROCO 5061 Series Operating Instructions Manual

BA50E103

Operating Instructions

ROCO Butterfly Valve

with SKG Slider-crank Mechanism,
with Electric Multi-turn Actuator

These operating instructions must always be used in combination with operating
instructions BA01E001!

1 Product and Performance Description

1.1 Product Description

ROCO Butterfly Valve to DIN 3354, part 2
with flanges, double-offset shaft bearing, resilient-seated, tightly closing, of ductile cast
iron.
Operation by SKG slider-crank mechanism by means of handwheel, extension stem,
underground installation set, chain wheel, electric multi-turn actuator.

Nominal sizes: DN 150, 200, 250, 300, 350, 400, 450, 500, 600
Pressure ratings: PN 10, 16

Prod. No.: 5064 .... PN 10

5065 .... PN 16

5061 .... PN 16/GN 10

1.2 Performance Description (see fig. 1)

A valve disc (3) hinged in the body (1) is moved through an actuating shaft (7) which
protrudes into a laterally mounted part-turn gearbox. The pipeline is isolated, when the
valve disc is vertical to the flow direction. Tight closure on the seat in the body is achieved
by a sealing element (profile sealing ring). The travel between ”OPEN” and ”CLOSED”
position (90° swinging movement) is limited by means of stop nuts on the actuating stem of
the attached part-turn gearbox. Normally, the valve closes in clockwise direction (turning
the handwheel to the right).

1 Product and Performance Description
2 Design Features of ROCO Butterfly Valve
3 Installation in the Pipeline
4 Initial Operation

5 Operation and Application
6 Maintenance
7 SKG Slider-crank Mechanism
8 Electric Multi-turn Actuator

BA50E103
Issue 02-06

REV2

ERHARD-Armaturen x D-89502 Heidenheim x Postfach 1280

Phone [phone]  [phone]

e-mail: info@erhard.d e Internet: http://www.erhard.de

Page 1/13

Operating Instructions for ROCO Butterfly Valve

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2 Design Features

Figure 1: Sectional Drawing of ROCO Butterfly Valve

Part Description Spare

part

1 Body 12 O-ring
2 Bearing bush 13 Hexagon screw
3 Valve disc 14 Washer
4 Profile sealing ring X 15 Key
5 Countersunk screw 16 Tab washer
6 Threaded pin 17 Hexagon screw
7 Actuating shaft 18 Shaft sealing set,

8 Trunnion O-rings, back-up rings

9 Bearing ring, divided 19 Retaining ring
10 Threaded pin 20 Cylindrical screw
11 Bearing cover 21 Parallel key

Part Description Spare

part

X

consisting of: spacer,

• Main sealing ring: steel-reinforced profile sealing ring (4) internally and externally rubber­coated, optimum corrosion protection, easily replaceable and adjustable.

• Body seat: enamel coated seat (product No. 50.. 72..) or rolled-in solid seat ring of
stainless steel (product No. 50.. 95..).

• Connection key/valve disc: well-approved and robust key connection (15) for force
transmission without clearance, tab washer (16).

• Gearbox connection: to prEN 12116 (DIN ISO 5211), round spigot with parallel key.

BA50E103
Issue 02/06

REV 2

ERHARD-Armaturen x D-89502 Heidenheim x Postfach 1280

Phone [phone]  [phone]

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Page 2/13

Operating Instructions for ROCO Butterfly Valve

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• Shaft sealing: on the drive side by means of fully enclosed 0-rings (18) of stainless
material, on the bearing side by O-ring (12) enclosed in the bearing cover (11).

• When the gearbox is disassembled, the shafts (7) and shaft sealing (18) are protected
against blowing-off.

• Shaft bearing: maintenance-free and self-lubricating plain bearings (2).

3 Installation into the Pipeline

Remove all packing material from the valve. Prior to installation, check the pipeline for
impurities and foreign bodies and clean it if necessary.

Attention !

It is important that all around the valve there is free access for operation and
maintenance. For outdoor installation, the customer has to protect the valve against
direct effects of the weather.

During installation of the valve, the distance between the pipe flanges should exceed the
valve face-to-face dimension by at least 20 mm. Thus, the raised faces will not be
damaged and the gaskets can be inserted. Steel-reinforced rubber seals are
recommended to be used as flange gaskets (consider resistance to flow medium and
temperature), for slip-on flanges they are absolutely necessary.

The mating pipe flanges must be plain-parallel and concentric.
Tighten the connecting bolts evenly (without distortion) and crosswise. The pipeline

mustn’t by any means be pulled up to the valve.
ROCO Butterfly Valves can be installed in any position.

In open position the valve disc exceeds the valve face-to-face dimension.
Keep corresponding distance to any fitting or valve, e.g. check valve.

4 Initial Operation

After installation, check valve for smooth operation: move the valve over the total travel
(Open – Closed) by means of operating element.

5 Operation and Application

5.1 Admissible Operation

The valve disc is designed for flow from the direct side (A preferred flow direction) as well
as from the indirect side (B).
The valve is operated by means of the handwheel, chain wheel or operating key to
DIN 3223. It is not permissible to apply excessive forces.

Max. admissible flow velocities:

PN 10: 4 m/sec.
PN 16: 5 m/sec.

BA50E103
Issue 02/06

REV 2

ERHARD-Armaturen x D-89502 Heidenheim x Postfach 1280

Phone [phone]  [phone]

e-mail: info@erhard.d e Internet: http://www.erhard.de

Page 3/13

Operating Instructions for ROCO Butterfly Valve

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5.2 Inadmissible Operation

Installation behind elbows or similar disturbing installation parts is to be prevented.
Long-time operation in throttled position leads to higher wear. When the valve is used as
throttling valve, it has to be checked whether the valve is suitable for the operating
conditions.
Do not exceed limiting values of the flow medium temperature.
Do not exceed limiting values of the working pressure.
Closed valve may only be charged up to the nominal pressure.
For EPDM profile sealing rings and sealings: rubber parts must not get in contact with oil
or grease (EPDM swells!).

6 Maintenance

6.1 Maintenance and Inspection

ROCO Butterfly Valves are equipped with maintenance-free plain bearings. Gearbox stem
and gearbox bearing are of the long-time lubricating type. Control of the performance and
tightness is to be done regularly in intervals of <= 4 years according to DVGW print
W390.

Before carrying out work on the valve, the repair valve must be
closed and the pipe section must be made pressureless.

Check external condition of the valve including operating gear.
If necessary clean the valve and repair the coating.
Check tightness at the flanges.
Check well-running of valve and operating gear.
Move valve manually over total travel.
Check seat tightness: close the valve.
Check pressure drop upstream and downstream of the valve.

6.2 Readjustment and Repair

6.2.1 Readjustment of the Profile Ring, fig. 2.

ROCO Butterfly Valves are equipped with a readjustable sealing system. The profile
ring (4) can be readjusted in closed position of the valve disc. For this purpose, loosen
the threaded pins (6) and tighten evenly the countersunk screws (5) in a crosswise
manner. As the profile sealing ring acts very fast when tightening, we recommend to
proceed by taking small steps (half turn of the screws). Afterwards tighten threaded
pins (6) by turning them in clockwise direction and thus locking the profile sealing ring.

BA50E103
Issue 02/06

REV 2

ERHARD-Armaturen x D-89502 Heidenheim x Postfach 1280

Phone [phone]  [phone]

e-mail: info@erhard.d e Internet: http://www.erhard.de

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