Spirax-Sarco temperature control valves are self-acting valves to control the temperature in steam systems. A change in temperature at the sensor will cause the liquid filling to expand or contract. If the liquid expands it will apply a force on the thrust pin which, in turn, will cause the valve plug to move. As the liquid contracts the force on the valve plug reduces and a spring reverses its direction of travel. For heating applications the valves will be normally open and will close against a rise in temperature. For cooling applications the valves will be normally closed and will open against a rise in temperature.

Category Products

  • SKU: SG3450
  • Ships within 5 business days

Spirax-Sarco BXRA 1/2" NPT normally-closed, single seat bronze temperature control valve for cooling.

Online Price: $539.21
Regular Price: $582.00

  • SKU: SG3452
  • Ships within 5 business days

Spirax-Sarco BX2 1/2" NPT normally-open, single seat bronze temperature control valve for heating.

Online Price: $340.02
Regular Price: $367.00

  • SKU: SG3454
  • Ships within 5 business days

Spirax-Sarco BX3 1/2" NPT normally-open, single seat bronze temperature control valve for heating.

Online Price: $340.02
Regular Price: $367.00

  • SKU: SG3456
  • Ships within 5 business days

Spirax-Sarco BX4 1/2" NPT normally-open, single seat bronze temperature control valve for heating.

Online Price: $340.02
Regular Price: $367.00

  • SKU: SG3458
  • Ships within 5 business days

Spirax-Sarco BX6 1/2" NPT normally-open, single seat bronze temperature control valve for heating.

Online Price: $340.02
Regular Price: $367.00

  • SKU: SG3460
  • Ships within 5 business days

Spirax-Sarco BMRA 1/2" ANSI 300 flanged reverse-acting, normally-closed, single seat cast steel temperature control valve for cooling. This valve has a Cv of 1.92.

Online Price: $1,360.80
Regular Price: $1,566.00

  • SKU: SG3462
  • Ships within 5 business days

Spirax-Sarco BM2 1/2" ANSI 300 flanged normally-open, single seat cast steel temperature control valve for heating. This valve has a Cv of 0.44.

Online Price: $1,119.18
Regular Price: $1,208.00

  • SKU: SG3464
  • Ships within 5 business days

Spirax-Sarco BM3 1/2" ANSI 300 flanged normally-open, single seat cast steel temperature control valve for heating. This valve has a Cv of 0.74.

Online Price: $1,256.53
Regular Price: $1,446.00

  • SKU: SG3466
  • Ships within 5 business days

Spirax-Sarco BM4 1/2" ANSI 300 flanged normally-open, single seat cast steel temperature control valve for heating. This valve has a Cv of 1.20.

Online Price: $1,279.12
Regular Price: $1,472.00

  • SKU: SG3468
  • Ships within 5 business days

Spirax-Sarco BM6 1/2" ANSI 300 flanged normally-open, single seat cast steel temperature control valve for heating. This valve has a Cv of 1.92.

Online Price: $1,279.12
Regular Price: $1,472.00

  • SKU: SG3470
  • Ships within 7 business days

Spirax-Sarco SBRA 1/2" NPT normally-closed bronze temperature regulating valve that opens with rising temperature for cooling.

Online Price: $720.90
Regular Price: $801.00

  • SKU: SG3472
  • Ships within 7 business days

Spirax-Sarco SB 1/2" NPT normally-open bronze temperature regulating valve that closes with temperature rise for heating, single seat.

Online Price: $368.74
Regular Price: $398.00

  • SKU: SG3474
  • Ships within 7 business days

Spirax-Sarco SBRA 1/2" NPT normally-closed bronze temperature regulating valve that opens with rising temperature for cooling. Single seat with optional 1/8" (Cv .44) bleed bypass.

Online Price: $918.14
Regular Price: $991.00

  • SKU: SG3476
  • Ships within 7 business days

Spirax-Sarco SBRA 3/4" NPT normally-closed bronze temperature regulating valve that opens with rising temperature for cooling.

Online Price: $913.50
Regular Price: $986.00

  • SKU: SG3478
  • Ships within 7 business days

Spirax-Sarco SB 3/4" NPT normally-open bronze temperature regulating valve that closes with temperature rise for heating, single seat.

Online Price: $379.86
Regular Price: $410.00

  • SKU: SG3480
  • Ships within 7 business days

Spirax-Sarco SBRA 3/4" NPT normally-closed bronze temperature regulating valve that opens with rising temperature for cooling. Single seat with optional 1/8" (Cv .44) bleed bypass.

Online Price: $920.92
Regular Price: $994.00

  • SKU: SG3482
  • Ships within 7 business days

Spirax-Sarco SBRA 1" NPT normally-closed bronze temperature regulating valve that opens with rising temperature for cooling.

Online Price: $1,017.27
Regular Price: $1,098.00

  • SKU: SG3484
  • Ships within 7 business days

Spirax-Sarco SB 1" NPT normally-open bronze temperature regulating valve that closes with temperature rise for heating, single seat.

Online Price: $504.00
Regular Price: $544.00

  • SKU: SG3486
  • Ships within 7 business days

Spirax-Sarco SBRA 1" NPT normally-closed bronze temperature regulating valve that opens with rising temperature for cooling. Single seat with optional 1/8" (Cv .44) bleed bypass.

Online Price: $1,022.83
Regular Price: $1,104.00

  • SKU: SG3488
  • Ships within 7 business days

Spirax-Sarco NS 2-1/2" NPT normally-open, self-acting bronze temperature control valve that closes with temperature rise for heating, double seat.

Online Price: $4,633.91
Regular Price: $5,443.00

  • SKU: SG3490
  • Ships within 7 business days

Spirax-Sarco NS 2-1/2" ANSI 150 flanged normally-open, self-acting bronze temperature control valve that closes with temperature rise for heating, double seat.

Online Price: $5,291.18
Regular Price: $6,383.00

  • SKU: SG3492
  • Ships within 7 business days

Spirax-Sarco NSRA 2-1/2" NPT normally-closed, self-acting bronze temperature control valve that opens with temperature rise for cooling, double seat.

Online Price: $5,428.78
Regular Price: $6,549.00

  • SKU: SG3494
  • Ships within 7 business days

Spirax-Sarco NSRA 2-1/2" ANSI 150 flanged normally-closed, self-acting bronze temperature control valve that opens with temperature rise for cooling, double seat.

Online Price: $6,415.31
Regular Price: $8,401.00

  • SKU: SG3496
  • Ships within 10 business days

Spirax-Sarco NS 3" ANSI 150 flanged normally-open, self-acting bronze temperature control valve that closes with temperature rise for heating, double seat.

Online Price: $9,125.46
Regular Price: $11,950.00

  • SKU: SG3542
  • Ships within 10 business days

Spirax-Sarco NS 3" NPT flanged normally-open, self-acting bronze temperature control valve that closes with temperature rise for heating, double seat.

Online Price: $5,054.10
Regular Price: $6,097.00

  • SKU: SG3498
  • Ships within 10 business days

Spirax-Sarco NSRA 3" ANSI 300 flanged normally-closed, self-acting bronze temperature control valve that opens with temperature rise for cooling, double seat.

Online Price: $6,439.75
Regular Price: $8,433.00

  • SKU: SG3500
  • Ships within 10 business days

Spirax-Sarco NSRA 3" ANSI 150 flanged normally-closed, self-acting bronze temperature control valve that opens with temperature rise for cooling, double seat.

Online Price: $6,439.75
Regular Price: $8,433.00

  • SKU: SG3502
  • Ships within 7 business days

Spirax-Sarco KA43 1/2" ANSI 300 flanged normally-open cast steel temperature control valve that closes with temperature rise for heating, single seat. This valve has a Cv of 3.36.

Online Price: $1,274.78
Regular Price: $1,467.00

  • SKU: SG3504
  • Ships within 7 business days

Spirax-Sarco KA43 3/4" ANSI 300 flanged normally-open cast steel temperature control valve that closes with temperature rise for heating, single seat. This valve has a Cv of 5.54.

Online Price: $1,286.07
Regular Price: $1,480.00

  • SKU: SG3506
  • Ships within 7 business days

Spirax-Sarco KA43 1" ANSI 300 flanged normally-open cast steel temperature control valve that closes with temperature rise for heating, single seat. This valve has a Cv of 11.4.

Online Price: $1,494.63
Regular Price: $1,720.00

  • SKU: SG3508
  • Ships within 7 business days

Spirax-Sarco KB43 1" ANSI 300 flanged normally-open cast steel temperature control valve that closes with temperature rise for heating. Single seat with phosphor bronze pressure balancing bellows. This valve has a Cv of 11.4.

Online Price: $1,712.74
Regular Price: $1,971.00

  • SKU: SG3510
  • Ships within 7 business days

Spirax-Sarco KA43 1-1/4" ANSI 300 flanged normally-open cast steel temperature control valve that closes with temperature rise for heating, single seat. This valve has a Cv of 19.2.

Online Price: $1,849.16
Regular Price: $2,128.00

  • SKU: SG3512
  • Ships within 7 business days

Spirax-Sarco KB43 1-1/4" ANSI 300 flanged normally-open cast steel temperature control valve that closes with temperature rise for heating. Single seat with phosphor bronze pressure balancing bellows. This valve has a Cv of 19.2.

Online Price: $2,067.27
Regular Price: $2,379.00

  • SKU: SG3514
  • Ships within 7 business days

Spirax-Sarco KC43 1-1/4" ANSI 300 flanged normally-open cast steel temperature control valve that closes with temperature rise for heating. Single seat with phosphor bronze pressure balancing bellows. This valve has a Cv of 19.2.

Online Price: $4,324.02
Regular Price: $5,079.00

  • SKU: SG3516
  • Ships within 7 business days

Spirax-Sarco KB43 1-1/2" ANSI 300 flanged normally-open cast steel temperature control valve that closes with temperature rise for heating. Single seat with phosphor bronze pressure balancing bellows. This valve has a Cv of 27.6.

Online Price: $2,872.98
Regular Price: $3,329.00

  • SKU: SG3518
  • Ships within 7 business days

Spirax-Sarco KB43 1-1/2" ANSI 300 flanged normally-open cast steel temperature control valve that closes with temperature rise for heating. Single seat with stainless steel pressure balancing bellows. This valve has a Cv of 27.6.

Online Price: $3,743.40
Regular Price: $4,397.00

  • SKU: SG3520
  • Ships within 7 business days

Spirax-Sarco KA43 2" ANSI 300 flanged normally-open cast steel temperature control valve that closes with temperature rise for heating, single seat. This valve has a Cv of 39.6.

Online Price: $2,719.36
Regular Price: $3,151.00

  • SKU: SG3522
  • Ships within 7 business days

Spirax-Sarco KB43 2" ANSI 300 flanged normally-open cast steel temperature control valve that closes with temperature rise for heating. Single seat with phosphor bronze pressure balancing bellows. This valve has a Cv of 39.6.

Online Price: $2,425.94
Regular Price: $2,811.00

  • SKU: SG3524
  • Ships within 7 business days

Spirax-Sarco KB43 2" ANSI 300 flanged normally-open cast steel temperature control valve that closes with temperature rise for heating. Single seat with stainless steel pressure balancing bellows. This valve has a Cv of 39.6.

Online Price: $5,206.62
Regular Price: $6,281.00

  • SKU: SG3526
  • Ships within 7 business days

Spirax-Sarco KX51B 1" NPT normally-closed bronze temperature control valve, with fixed bleed, that opens with temperature rise for cooling, single seat.

Online Price: $1,708.39
Regular Price: $1,966.00

  • SKU: SG3528
  • Ships within 7 business days

Spirax-Sarco KX51B 1-1/4" NPT normally-closed bronze temperature control valve, with fixed bleed, that opens with temperature rise for cooling, single seat.

Online Price: $2,080.31
Regular Price: $2,394.00

  • SKU: SG3530
  • Ships within 7 business days

Spirax-Sarco KY51 1-1/4" NPT normally-closed bronze temperature control valve, that opens with temperature rise for cooling, single seat. This valve incorporates a pressure balancing bellows, which enables the valve to operate against higher differential pressures.

Online Price: $1,790.07
Regular Price: $2,060.00

  • SKU: SG3532
  • Ships within 7 business days

Spirax-Sarco KX51B 1-1/2" NPT normally-closed bronze temperature control valve, with fixed bleed, that opens with temperature rise for cooling, single seat.

Online Price: $2,155.04
Regular Price: $2,480.00

  • SKU: SG3534
  • Ships within 7 business days

Spirax-Sarco KY51 1-1/2" NPT normally-closed bronze temperature control valve, that opens with temperature rise for cooling, single seat. This valve incorporates a pressure balancing bellows, which enables the valve to operate against higher differential pressures.

Online Price: $1,902.17
Regular Price: $2,189.00

  • SKU: SG3536
  • Ships within 7 business days

Spirax-Sarco KX51B 2" NPT normally-closed bronze temperature control valve, with fixed bleed, that opens with temperature rise for cooling, single seat.

Online Price: $2,318.40
Regular Price: $2,668.00

  • SKU: SG3538
  • Ships within 7 business days

Spirax-Sarco KY51 2" NPT normally-closed bronze temperature control valve, that opens with temperature rise for cooling, single seat. This valve incorporates a pressure balancing bellows, which enables the valve to operate against higher differential pressures.

Online Price: $2,363.59
Regular Price: $2,720.00

Category Information