Non-Rising Stem (NRS) Cast Iron Gate Valve – Bronze Seated (T-wrench Operation with Square Socket)

Description

Technical Data Sheet

Non-Rising Stem (NRS) Cast Iron Gate Valve – Bronze Seated
(T-wrench Operation with Square Socket)

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1. General Description

• Product Type: Flanged End, Non-Rising Stem (NRS), Solid Wedge Gate Valve

• Seat Type: Bronze-to-Bronze Metal Seated (Metal-to-Metal)

• Operation: Square Socket (female) for T-wrench operation – no handwheel

• Design Standard: MSS SP-70 / API 602 / ASME B16.34

• Pressure-Temperature Rating: ASME B16.34 / Class 125 / Class 150

• Ends: Flanged to ASME B16.1 Class 125 or ASME B16.5 Class 150

• Face-to-Face: ASME B16.10

• Test Standard: API 598 / EN 12266-1

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2. Application

• Suitable Media: Water, oil, gas, steam, and non-aggressive industrial fluids

• Temperature Range: -20°C up to +200°C (depending on trim and packing)

• Pressure Rating: Class 125 (200 PSI) / Class 150 (PN20)

• Typical Installation: Buried service (with extension spindle), valve pits, floor-mounted installations where space is limited and handwheel operation is impractical

• Industry Standards: Suitable for potable water (consult for NSF/ANSI 61 compliance)

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3. Technical Parameters (Class 125 / Class 150)

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4. Materials of Construction

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5. Key Features

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6. Square Socket (T-Wrench Operation) Details

• Connection Type: Female square drive machined into stem top (operating nut)

• Purpose: Allows operation using a portable T-wrench or extension spindle with matching square drive

• Operation Torque: Designed for manual operation using standard T-key

• Direction to Close: Clockwise (standard)

• Optional Accessories: Extension spindles, floor boxes, and T-keys available for buried service

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7. Dimensions & Weights (Reference Values – ASME B16.10 / B16.1 Class 125)

*Note: Dimensions are based on MSS SP-70 and ASME B16.10 standards. Request certified drawing from manufacturer for exact dimensions. *

*(Data compiled from MSS SP-70 and ASME B16.10 / B16.1 standards )*

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8. Testing (Per API 598)

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9. Installation & Operation Notes

1. Non-Rising Stem: The stem does NOT rise during operation. Valve position (open/closed) cannot be visually determined from stem position. Use position indicators on extension spindle or count turns to determine position .

2. T-Wrench Operation: Standard supply includes the square socket (operating nut) only. The T-wrench operating key, extension spindles, and floor box must be ordered separately .

3. Metal Seated: This valve has bronze-to-bronze seating and allows a small amount of leakage per API 598 (not bubble-tight like resilient seated valves) .

4. Flange Gaskets: Use full-face gaskets or ring gaskets as appropriate for ASME B16.1 Class 125 flanges.

5. Flow Direction: Suitable for bi-directional flow.

6. Buried Service: For buried installations, specify extension spindle length and floor box with operating square.

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10. Options & Accessories

• Stem Material: Stainless Steel 304/316 or Brass

• Coating: Fusion bonded epoxy (blue RAL 5005 or black) per AWWA C550

• Extension Spindles: For buried service (specify required length)

• Floor Boxes: With cover and operating key

• Position Indicators: For extension spindles to show valve position

• Gear Operation: For larger sizes (above 12″) where operating torque is high

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11. Ordering Information

To ensure correct selection, please specify:

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This data sheet is a guideline based on standard industry practice for American Standard Non-Rising Stem Cast Iron Gate Valves with Bronze seats and T-wrench operation . Always refer to the manufacturer’s certified drawings for exact dimensions and ratings.