Data Sheet for Product

ManualsBrandsSiemens Manuals656 Series Globe Valves656 Powermite Repack Kit (Pack of 6)

Powers

Controls

Technical Instructions

Document No. 155-086P25

VP 656-3

March 7, 2005

VP 656 Powermite

Three-way Mixing Valves

(Flared Type)

Siemens Industry, Inc.

Description

The VP 656 Powermite Three-way Mixing Valves are designed for water mixing

applications. The valve body is a high grade bronze forging with connections for 1/2-in

O.D. SAE flare fittings.

Features

• Optimum flow/constant discharge capacity provided by use of a specially designed

plug at the throttling port, Normally Open (NO), and a complementary plug at the

bypass port, Normally Closed (NC).

• Enclosed actuator housing to protect the diaphragm, spring. etc.

• Small size allows installation in restricted space.

• Actuator can be rotated to facilitate air connection.

• Stainless steel valve stem to reduce friction and corrosion.

Product Numbers

Table 1.

Product Number

Spring

Rating

Valve Size In (mm)

656-0009 2.5 10-15 Ib (69-103 kPa) .5 (.13)

656-0010 2.5 3-8 lb (21 -55 kPa) .5 (.13)

656-0011 1.5 3-8 lb (21-55 kPa) .5 (.13)

Warning/Caution Notations

WARNING

Personal injury/loss of life may occur if you do not perform a

procedure as specified.

CAUTION

Equipment damage, or loss of data may occur if you not perform a

procedure as specified.

Summary of content (6 pages)

PAGE 1
Technical Instructions Document No. 155-086P25 VP 656-3 March 7, 2005 PowersTM Controls VP 656 Powermite Three-way Mixing Valves (Flared Type) Description The VP 656 Powermite Three-way Mixing Valves are designed for water mixing applications. The valve body is a high grade bronze forging with connections for 1/2-in O.D. SAE flare fittings.
PAGE 2
Technical Instructions Document No. 155-086P25 March 7, 2005 Valve size/capacity Valve body style Valve action Specifications Valve Body See Table 2. Flared End Upper seat normally closed Bottom seat normally open 3/8-inch (9.5 mm) 300 psig @ 350°F (2068 kPa @ 177°C) Modified equal percentage Valve stroke Valve body rating Flow characteristic (B port) Valve Actuator Nominal spring span Effective diaphragm area Maximum air supply to diaphragm Air connection Standard spring ranges 5 psi (34.
PAGE 3
VP 656 Powermite Three-Way Mixing Valves (Flared Type) Operation Technical Instructions Document No. 155-086P25 March 7, 2005 The control pressure from the controller is connected to the upper housing, above the valve diaphragm. With no air pressure in the upper housing, the internal compression spring exerts force against the piston plate which holds the stem assembly tight against the upper seat permitting the flow from NO port to Common (C) port.
PAGE 4
Technical Instructions Document No. 155-086P25 March 7, 2005 Table 3. Part Numbers (See Figure 2). No. Page 4 Name No. Req'd Material 1 Phos. Bronze - 1 Brass See Items 28 and 30 Kits 4 Steel See Item 28 Kit 1 Rubber Cv 1.5 Cv 2.5 3-8 psi Cv 2.5 10-15 psi 1 E-ring See Items 29 and 30 Kits 2 Piston Plate 3 #8-32 × 7/16 Lg. Filister Hd. Scr.
PAGE 5
VP 656 Powermite Three-Way Mixing Valves (Flared Type) Technical Instructions Document No. 155-086P25 March 7, 2005 Valve Components Figure 2. Valve Construction (See Table 3). Installation Service • It is not necessary to remove the valve top for normal installation. • In concealed installations, sufficient room should be allowed so that the upper housing can be removed for valve servicing. A distance of two inches (51 mm) from top of the housing is sufficient.
PAGE 6
Technical Instructions Document No. 155-086P25 March 7, 2005 Dimensions Figure 3. Dimensions in Inches (Millimeters). Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models as design improvements are introduced. Powers is a registered trademark of Siemens Industry, Inc. Other product or company names mentioned herein may be the trademarks of their respective owners. © 2005 Siemens Industry, Inc.