Overview
This document provides detailed technical information about stainless steel bulk and reject valves, specifically the LOHSE RQS and RQSV series. These valves are designed for handling granular materials, powders, and media containing reject fractions such as nails and staples. They are suitable for applications in pulp and paper production, chemical industry, and heavy soiling extraction or cleaning devices.

Valve Types and Operating Elements
- RQS: Reject valves with circular inlet and square outlet.
- RQSV: Similar to RQS but with hardened wear ring and valve plate.
- Operating elements include handwheel drive with non-rising stem (Hns) and pneumatic cylinder (P).

Applications and Media
- Designed for media with reject parts, coarse-grained materials, granulates, and powders.
- Temperature range up to 80 °C (depending on sealing material).
- Leak tested according to DIN EN 12266-02:2012-04, Table A5, with liquid test medium and leakage rate A (watertight).

Materials and Construction
- Housing and valve plate made of stainless steel 1.4571.
- Flow sealing options: SBR, PE, PTFE, or CuSn 12.
- Slide borders made of CuAl 10 Ni5Fe4.
- Wear rings available in stainless steel 1.4571, SBR, or bronze slide ring.
- Slide blocks made of CuSn6.
- Stuffing box gland made of 1.4551.
- Packing assembly uses Arostat / EPDM.
- Bracket made of 1.4301 stainless steel.

Operating Parameters
- Maximum operating pressure:
• DN 100–200: 8 bar
• DN 250–300: 4 bar
• DN 400–600: 2 bar
- Maximum operating temperature varies by sealing material:
• PE sealing ring: 80 °C
• SBR wear ring: 80 °C
• Bronze slide ring wear ring: 120 °C
• PTFE sealing ring: 200 °C

Design Features
- Valves have round inlet and square outlet to facilitate good discharge.
- Inlet side may have stainless steel wear ring or rubber sealing ring (SBR).
- Seating achieved via sealing rings of PE, PTFE, bronze, or rubber lip.
- Bronze guides are designed to prevent medium buildup and allow free movement.
- Flange connections conform to DIN EN 1092-1 PN 10 or ANSI B16.5 Class 150 standards depending on version.
- Flange bore dimensions and thread specifications are provided for metric and UNC threads.

Dimensions and Flange Details
- Detailed tables list dimensions for DN 100 to DN 600 valves including flange bore diameters, number of holes, thread sizes, and overall valve dimensions.
- Separate tables for metric and UNC thread flange bores.
- Pneumatic cylinder versions include air connection details per VDI/VDE 3845 (NAMUR) standard and control pressure requirements (typically 6 bar).

Valve Variants
- RQSHns: Handwheel drive with non-rising stem.
- RQSVP/G: Pneumatic cylinder operated with protection guard.
- Hardened wear ring and valve plate versions available for increased durability.

Contact and Agency Information
- Manufacturer: MARTIN LOHSE GmbH, Germany.
- Comprehensive list of international agencies and distributors covering Europe, Asia, Americas, Africa, and Oceania.
- Contact details include phone, fax, email, and websites for each agency.

Critical Information Summary
- Valves are designed for robust industrial applications involving reject materials and abrasive media.
- Material selection and sealing options allow operation up to 200 °C and pressures up to 8 bar depending on size.
- Compliance with international standards ensures reliability and interchangeability.
- Modular design allows for handwheel or pneumatic operation.
- Detailed dimensional data supports integration into existing piping systems.