Concept

Non-return valve LKC-2 is designed for use in stainless steel pipe

installations to prevent reverse flow.

Working principle

LKC-2 opens when the pressure below the valve plug exceeds the

pressure above the plug and the spring force.

The valve closes when pressure equalization has been achieved. A

higher counter pressure will press the valve plug against the seat.

Standard Design

The valve body is in two parts, assembled by means of a clamp ring

and hygienically sealed with a special seal ring. A guide disc and four

legs guide the spring loaded valve plug with an O-ring seal.

The valve is available with welding ends for tubes according to ISO

and DIN 11850.

TECHNICAL DATA

Temperature

Max. temperature: . . . . . . . . . . . . . 140°C (EPDM)

Min. temperature: . . . . . . . . . . . . . . -10°C

Pressure

Max. product pressure: . . . . . . . . . . 1000 kPa (10 bar)

Mechanical

Required differential pressure for opening the valve when fitted in a

vertical pipe, as shown in fig. 3, is approx. 6 kPa (0.06 bar)

PHYSICAL DATA

Materials

Product wetted steel parts: . . . . . . . . 1.4301 (304) / 1.4404 (316L)

External surface finish . . . . . . . . . . . Semi-bright (blasted)

Internal surface finish . . . . . . . . . . . . Bright (polished), Ra < 0.8 μm

Product wetted seals: . . . . . . . . . . . EPDM rubber

Options

Product wetted seal rings of Nitrile (NBR) or Fluorinated rubber (FPM).

Pressure drop/capacity diagram

Fig. 1. Note!

For the diagram the following applies:

Medium: Water (20°C).

Measurement: In accordance with VDI 2173.

Fig. 2 = Flow direction.

Shows the optimal built-in situation. Other positions

possible are e.g. horizontal. The four guide legs of

the valve cone ensure good alignment.

90° rotation.

Dimensions (mm)

Table 1. Dimensions.