Description

TECHNICAL DATA SHEET

Monoflange Type Wafer Butterfly Valve

Project Name: ____________________
Project No.: ____________________
Date: February 24, 2026

1. BASIC VALVE INFORMATION

2. DESIGN STANDARDS & SPECIFICATIONS

3. MAIN TECHNICAL PARAMETERS

4. MAIN COMPONENTS MATERIALS

5. STRUCTURAL CHARACTERISTICS & TECHNICAL REQUIREMENTS

1. Connection Type: Monoflange wafer construction. The valve body has an integral cast flange at the center (monoflange) with bolt holes; both ends are wafer-type sealing faces without flanges.

2. Installation Method:

   • Valve is sandwiched between two pipeline flanges, tightened by through-bolts connecting both side flanges.

   • Monoflange function: Can be used as support flange fixed to a bracket, as anchor flange to prevent axial movement, or for connection to auxiliary piping/support structure.

   • Bolts pass through monoflange and pipeline flanges for overall tightening.

3. Sealing Structure: Concentric soft seal design, disc interference fit with rubber seat achieving zero leakage. Seat adopts fully vulcanized process.

4. Disc Material Advantage: Stainless steel disc, corrosion resistant, prevents sticking due to rust.

5. Operation Type: Worm gear operation (standard for D371X model):

   • Worm gear transmission, labor-saving operation

   • Self-locking function, can be positioned at any angle

   • Handwheel clockwise close, counterclockwise open, with position indicator

   • Worm gear box IP65 protection rating

6. Face-to-Face Dimension: According to GB/T 12221 Series 16 short pattern.

7. Monoflange Load Capacity: The monoflange can bear certain pipeline weight or serve as anchoring point. Suitable for applications requiring intermediate pipe support or anti-vibration fixing.

6. DIMENSIONS & CONNECTION SIZES (Unit: mm)

Note: Reference dimensions for PN16 rating. Monoflange located at body center.

7. OTHER REQUIREMENTS

1. Coating:

   • Body (ductile iron) exterior: Epoxy anti-rust paint, film thickness ≥150μm, color: blue (or as per user request).

   • Monoflange sealing surface to be protected from painting.

   • Stainless steel disc: No coating, natural metal finish.

2. Protection & Storage:

   • Valve ends protected with plastic caps.

   • Worm gear box with waterproof packaging.

   • Monoflange can be used as lifting point, ensure balanced lifting.

3. Nameplate: Fixed on worm gear box or body, indicating: Manufacturer, Model D371X (Monoflange Type), Nominal Diameter, Nominal Pressure, Operating Temperature, Body/Disc/Seat Materials, Manufacturing No. and Date.

4. Warranty: 12 months after commissioning or 18 months after delivery.

5. Monoflange Load Capacity: This valve’s monoflange is designed for intermediate support and anchoring. Maximum allowable load depends on pipe size and operating conditions. Please consult manufacturer for specific load ratings.

8. REMARKS

• Please select below:

  • □ Seat Material: EPDM (Ethylene Propylene Rubber, temp. -10~+80℃, resistant to hot water, aging resistant)

  • □ Seat Material: NBR (Nitrile Rubber, temp. -10~+120℃, good oil resistance)

• Monoflange bolt holes: Through holes (standard configuration)

• Matters not covered in this sheet shall be according to technical agreement signed by both parties and GB/T 12238 standard.

• If monoflange to be used as main anchoring point, please provide pipeline weight, support spacing, and any vibration/dynamic load parameters for strength verification.

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Prepared by: ________________
Checked by: ________________
Approved by: ________________

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This technical data sheet accurately describes the Monoflange Type Wafer Butterfly Valve:

• ✅ Integral monoflange at valve body center

• ✅ Both ends wafer type connection

• ✅ Model: D371X (Monoflange Type)

• ✅ Materials: Ductile Iron Body, Stainless Steel Disc, Rubber Seat

• ✅ Operation: Worm Gear

The monoflange provides intermediate support and anchoring capability, ideal for pipeline systems requiring additional stability or vibration control.